Document in README.Debian that new postfix-resolvconf.path/service files need to be manually enabled if needed and override dh_installsystemd to that effect

Add postfix-resolvconf.path/service to watch for resolv.conf changes and restart postfix using the existing hook if it is updated.

Addresses-Debian-Bug: 1003152

671d960c added the dpkg option `extend-diff-ignore`, which also pleases
building postfix twice regarding changed html files due to updates to
their dependency source files from Debian patches.

The man pages are not safely build in parallel as every target
uses the same temporary file `junk`.

Christian Göttsche authored Jan 08, 2022 and Scott Kitterman committed Jan 09, 2022

The shared libraries in the postfix base package are not intended to be
used by other packages, as they are not versioned and do not have an ABI
stability guarantee. Since they are not versioned and not in the default
library directories of the dynamic linker skip the calls of ldconfig(8).
See Debian Policy 8.1.1

Christian Göttsche authored Jan 08, 2022 and Scott Kitterman committed Jan 09, 2022

The shared libraries of plugins doe not have an ABI stability and no
third party package should link against them.

Seems those were needed 5 years ago: 51889fcd

Please pylint:
    C0325: Unnecessary parens after 'return' keyword (superfluous-parens)
    C0305: Trailing newlines (trailing-newlines)
    W0404: Reimport 'sys' (imported line 27) (reimported)
    R1732: Consider using 'with' for resource-allocating operations (consider-using-with)
    R1732: Consider using 'with' for resource-allocating operations (consider-using-with)
    W0611: Unused import os (unused-import)

Please pylint:
    C0325: Unnecessary parens after 'return' keyword (superfluous-parens)
    C0305: Trailing newlines (trailing-newlines)
    W0404: Reimport 'sys' (imported line 27) (reimported)
    R1732: Consider using 'with' for resource-allocating operations (consider-using-with)
    R1732: Consider using 'with' for resource-allocating operations (consider-using-with)
    W0611: Unused import os (unused-import)

postinst.functions is available since Buster and all other maintainer
scripts include it unconditionally already.

Use strict mode and enable warnings.
Rework file handling to not use barewords, see
https://wiki.sei.cmu.edu/confluence/display/perl/FIO00-PL.+Do+not+use+bareword+file+handles

Debhelper will inject appropriate code already:

    # Automatically added by dh_installsystemd/13.6
    if [ -z "${DPKG_ROOT:-}" ] && [ "$1" = remove ] && [ -d /run/systemd/system ] ; then
	    deb-systemd-invoke stop 'postfix.service' >/dev/null || true
    fi
    # End automatically added section
    # Automatically added by dh_installinit/13.6
    if [ -z "${DPKG_ROOT:-}" ] && [ "$1" = remove ] && [ -x "/etc/init.d/postfix" ] ; then
	    invoke-rc.d --skip-systemd-native postfix stop || exit 1
    fi
    # End automatically added section

Reorder, so the directories get removed afterwards.

Drop unused variables, canonicalize condition.

Quote paths, drop unused variables, canonicalize conditions.

Since the only remaining usage was inside postfix.postinst it is not
necessary to keep it for upgrades.

Create the directories with the default SELinux context in the first
place, instead of fixing it later on.

Christian Göttsche authored Jan 06, 2022 and Scott Kitterman committed Jan 06, 2022

The substvars files for each binary package are sufficient.

Christian Göttsche authored Jan 05, 2022 and Scott Kitterman committed Jan 06, 2022

The included html pages are being cleaned and then later re-generated
since source code changes in Debian patches, e.g to src/smtpd/smtpd.c,
causing the resulting html page to be re-generated, i.e. smtpd.8.html.
Previously only smtpd.8.html, posttls-finger.1.html and makedefs.1.html
were build, now all of them.

Christian Göttsche authored Jan 05, 2022 and Scott Kitterman committed Jan 06, 2022

Otherwise make just treats it as a variable.

txt2man -t postfix-collate -r postfix-3.6.3 -d  -s 1 auxiliary/collate/README > debian/postfix/usr/share/man/man1/postfix-collate.1
expand: 1: No such file or directory

Spotted by a vigilant observer.

Addresses-Debian-Bug: 999694

Add collate.pl script as postfix-collate

Addresses-Debian-Bug: 941457

Addresses-Debian-Bug: 964762