Rename the repository to inbuxa-webmail

The repository moved from inbuxa/ihasmail-inbuxa to inbuxa/inbuxa-webmail,
matching inbuxa-server and inbuxa-admin. Point the source links, the image
name and the package link at the new name. The OAuth client id stays
ihasmail-inbuxa, since that is what the server registers.

server/src/config.ts

@@ -292,10 +292,10 @@ export const config = {
    *
    * The AGPL asks whoever *runs* a modified version to offer that version's
    * source, not the one it was forked from -- so anyone deploying a patched
-   * ihasmail should point this at their own tree. ihasmail-inbuxa is itself
+   * ihasmail should point this at their own tree. inbuxa-webmail is itself
    * such a tree, so the default is INBUXA's fork.
    */
-  sourceUrl: env("SOURCE_URL", "https://git.coffeylabs.org/inbuxa/ihasmail-inbuxa"),
+  sourceUrl: env("SOURCE_URL", "https://git.coffeylabs.org/inbuxa/inbuxa-webmail"),
   /**
    * ihasmail-inbuxa: this webmail's own name, shown in Settings > About next
    * to the mail node it talks to. Set per host by the deploy; empty means the