Rename the identifiers that carried the upstream name

Everything clients, users and operators meet now carries the fork's name,
with no aliases (SPEC.md §2.4, changed here from "protocol identifiers
stay"):

- JMAP: upstream's registry capability is urn:inbuxa:jmap:registry, beside
  the fork's own urn:inbuxa:jmap.
- WebDAV lock and sync tokens are urn:inbuxa:dav*; clients resync once.
- Sieve: vnd.inbuxa.while and vnd.inbuxa.expressions. sieve-rs spells these
  into its compiler, so it's vendored (vendor/sieve-rs, 0.7.3) and patched in;
  a unit test fails if Cargo.lock ever moves past the vendored copy. The
  trusted runtime now names itself too, rather than answering sieve-rs's
  default.
- The web interface's OAuth client is inbuxa-webui. On every start the old
  stalwart-webui client is removed and any application naming it is moved
  over.
- The spam filter's blobs are INBUXA_SPAM_*; every start moves any left
  under the old keys, so a trained model survives.
- SQL stores and log files default to inbuxa, in the code and in the
  schema served to the admin (checksum regenerated).
- Settings are INBUXA_* only. A STALWART_* variable that's set where its
  INBUXA_* one isn't stops the server at startup, naming it.
- The version-upgrade messages link docs.inbuxa.org's migration page, and
  the OpenAPI description, smtp crate metadata and web-push test fixtures
  lose the name.

Kept on purpose, allowlisted with reasons: the OAuth key-derivation
contexts (renaming them would end every session and invalidate every
sealed client id) and the hashed application prefix.

Also fixes a latent start-up failure: ensure_client updated an existing
first-party client with a revision of 0, which the registry's assertion
never matches, so adding a redirect URI or changing the webmail secret
failed start-up. And the principal session test now expects
legacyProtocols (C-1, added 2026-09-21), which it had missed.

Tested: the server builds without warnings; common's 106 unit tests,
including the vendoring check; a new integration test for the two
start-up migrations; and the webdav, jmap, imap and SMTP Sieve suites.

vendor/sieve-rs/src/compiler/grammar/tests/test_spamtest.rs

@@ -0,0 +1,162 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Stalwart Labs Ltd <[email protected]>
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
+ */
+
+use crate::compiler::{
+    CompileError, Value,
+    grammar::{Capability, Comparator, instruction::CompilerState},
+    lexer::{Token, word::Word},
+};
+
+use crate::compiler::grammar::{MatchType, test::Test};
+
+/*
+           Usage:    spamtest [":percent"] [COMPARATOR] [MATCH-TYPE]
+                     <value: string>
+*/
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(
+    any(test, feature = "serde"),
+    derive(serde::Serialize, serde::Deserialize)
+)]
+#[cfg_attr(
+    feature = "rkyv",
+    derive(rkyv::Serialize, rkyv::Deserialize, rkyv::Archive)
+)]
+pub(crate) struct TestSpamTest {
+    pub value: Value,
+    pub match_type: MatchType,
+    pub comparator: Comparator,
+    pub percent: bool,
+    pub is_not: bool,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(
+    any(test, feature = "serde"),
+    derive(serde::Serialize, serde::Deserialize)
+)]
+#[cfg_attr(
+    feature = "rkyv",
+    derive(rkyv::Serialize, rkyv::Deserialize, rkyv::Archive)
+)]
+pub(crate) struct TestVirusTest {
+    pub value: Value,
+    pub match_type: MatchType,
+    pub comparator: Comparator,
+    pub is_not: bool,
+}
+
+impl CompilerState<'_> {
+    pub(crate) fn parse_test_spamtest(&mut self) -> Result<Test, CompileError> {
+        let mut match_type = MatchType::Is;
+        let mut comparator = Comparator::AsciiCaseMap;
+        let mut percent = false;
+        let value;
+
+        loop {
+            let token_info = self.tokens.unwrap_next()?;
+            match token_info.token {
+                Token::Tag(
+                    word @ (Word::Is
+                    | Word::Contains
+                    | Word::Matches
+                    | Word::Value
+                    | Word::Count
+                    | Word::Regex),
+                ) => {
+                    self.validate_argument(
+                        1,
+                        match word {
+                            Word::Value | Word::Count => Capability::Relational.into(),
+                            Word::Regex => Capability::Regex.into(),
+                            Word::List => Capability::ExtLists.into(),
+                            _ => None,
+                        },
+                        token_info.line_num,
+                        token_info.line_pos,
+                    )?;
+
+                    match_type = self.parse_match_type(word)?;
+                }
+                Token::Tag(Word::Comparator) => {
+                    self.validate_argument(2, None, token_info.line_num, token_info.line_pos)?;
+                    comparator = self.parse_comparator()?;
+                }
+                Token::Tag(Word::Percent) => {
+                    self.validate_argument(
+                        3,
+                        Capability::SpamTestPlus.into(),
+                        token_info.line_num,
+                        token_info.line_pos,
+                    )?;
+                    percent = true;
+                }
+                _ => {
+                    value = self.parse_string_token(token_info)?;
+                    break;
+                }
+            }
+        }
+
+        Ok(Test::SpamTest(TestSpamTest {
+            value,
+            percent,
+            match_type,
+            comparator,
+            is_not: false,
+        }))
+    }
+
+    pub(crate) fn parse_test_virustest(&mut self) -> Result<Test, CompileError> {
+        let mut match_type = MatchType::Is;
+        let mut comparator = Comparator::AsciiCaseMap;
+        let value;
+
+        loop {
+            let token_info = self.tokens.unwrap_next()?;
+            match token_info.token {
+                Token::Tag(
+                    word @ (Word::Is
+                    | Word::Contains
+                    | Word::Matches
+                    | Word::Value
+                    | Word::Count
+                    | Word::Regex),
+                ) => {
+                    self.validate_argument(
+                        1,
+                        match word {
+                            Word::Value | Word::Count => Capability::Relational.into(),
+                            Word::Regex => Capability::Regex.into(),
+                            Word::List => Capability::ExtLists.into(),
+                            _ => None,
+                        },
+                        token_info.line_num,
+                        token_info.line_pos,
+                    )?;
+
+                    match_type = self.parse_match_type(word)?;
+                }
+                Token::Tag(Word::Comparator) => {
+                    self.validate_argument(2, None, token_info.line_num, token_info.line_pos)?;
+                    comparator = self.parse_comparator()?;
+                }
+                _ => {
+                    value = self.parse_string_token(token_info)?;
+                    break;
+                }
+            }
+        }
+
+        Ok(Test::VirusTest(TestVirusTest {
+            value,
+            match_type,
+            comparator,
+            is_not: false,
+        }))
+    }
+}