INBUXA's name and site where the webmail still said ihasmail

- The sign-in footer names the build "INBUXA webmail" and links to
  inbuxa.org, next to its AGPL source link.
- About gives the INBUXA webmail version, and credits ihasmail on a line
  of its own.
- The user menu's "About ihasmail" is "About INBUXA", to inbuxa.org. The
  Documentation entry pointed at ihasmail's docs; it's gone until INBUXA
  has documentation of its own.
- The startup log says "mail server:" rather than naming the server
  software.

"About INBUXA" and "Built on {ihasmail}" are translated in all nine
catalogues.

web/src/views/Login.tsx

@@ -151,9 +151,10 @@ export function LoginPage() {
             One <p> with a break rather than two: .foot carries a 20px
             margin-top, which a second paragraph would repeat as a gap.
           */}
-          <span className="notranslate" translate="no">ihasmail v{APP_VERSION}</span>
+          {/* ihasmail-inbuxa: this build is INBUXA's webmail, and its site is INBUXA's. */}
+          <span className="notranslate" translate="no">INBUXA webmail v{APP_VERSION}</span>
           <br />
-          <a href="https://ihasmail.org" target="_blank" rel="noopener noreferrer">{t("ihasmail.org")}</a>
+          <a href="https://inbuxa.org" target="_blank" rel="noopener noreferrer" className="notranslate" translate="no">inbuxa.org</a>
           {" · "}
           <a href={withBase(SOURCE_ARCHIVE)} target="_blank" rel="noopener noreferrer">{t("AGPL-3.0 source")}</a>
           {" "}