Merge exim4 from Debian Unstable for r-series

Scheduled-For: ubuntu-25.11
Ubuntu: 4.98.2-1ubuntu2
Debian Unstable: 4.98.2-2
Debian Experimental: 4.99~RC2-1

A new release of exim4 is available for merging from Debian Unstable.

If it turns out this needs a sync rather than a merge, please change the tagging from ['needs-merge', 'upgrade-software-version'] to ['needs-sync', 'upgrade-software-version'], and (optionally) update the title as desired.

### New Debian Changes ###

exim4 (4.98.2-2) unstable; urgency=medium

  * Set current_directory = /var/mail in mail_spool transport.
    Closes: #1106865
  * Fix eximon FTBFS with gcc-15. Closes: #1096601

 -- Andreas Metzler <email address hidden> Thu, 14 Aug 2025 13:58:16 +0200

### Old Ubuntu Delta ###

exim4 (4.98.2-1ubuntu2) questing; urgency=medium

  * d/p/Fix-build-error-with-gcc-15.patch: fix eximon ftbfs with gcc-15
    Closes: #1096601 (LP: #2124274)

 -- Nishit Majithia <email address hidden> Wed, 17 Sep 2025 18:33:26 +0530

exim4 (4.98.2-1ubuntu1) questing; urgency=medium

  * Merge with Debian unstable. Remaining changes:
    - Show Ubuntu distribution in SMTP banner
      + d/p/fix_smtp_banner.patch: Show Ubuntu distribution
        in SMTP banner.
      + d/control: Build-Depends on lsb-release to detect Distribution.
    - Disable external SPF support to avoid Build-Depends on libspf2-dev
      (only available in universe). SPF can still be implemented via
      spf-tools-perl, as documented in exim4.conf.template. This reverts
      Vcs-Git commit 494f1fe, first released in 4.95~RC0-1.
      (LP #1952738)
      + d/control: drop Build-Depends on libspf2-dev.
      + d/EDITME.exim4-heavy.diff: disable support for libspf2.
      + d/d/c/a/30_exim4-config_check_rcpt: restore SPF logic based
        on spfquery.mail-spf-perl from spf-tools-perl, but without
        the previously supported helo detection.

 -- Bryce Harrington <email address hidden> Thu, 12 Jun 2025 00:44:26 -0700