This reverts commit 97d9cd64.

The included patch has no effect on the linking strategy of the build.
The build system of postfix is unfortunately overly complicated for no
reason and other link flags need to be handed in over `AUXLIBS` and
header include locations via `CCARGS`.

Fixes #1.

Signed-off-by: David Runge <dvzrv@archlinux.org>

Signed-off-by: David Runge <dvzrv@archlinux.org>

Remove now included patch for linux >= 6.
Add make options to a local array for better readability.
Expand all depends array to be one line per entry.

devtools 20230105-1 enables the debug option by default.

A follow-up commit will remove debug from alongside other options.

archlinux/devtools!109 (comment 74475)

Remove unneeded quotes and curly braces.

Link against libpcre2-8.so (not libpcre2-32.so).
https://bugs.archlinux.org/task/73656.

Replace pcre with pcre2.
Simplify installation of files for split packages.

Simplify quoting in file.

Install additional auxiliary script (and accompanying documentation).
Fix pkgdesc of split packages.

Replace libnsl with libnsl.so in depends for postfix.

Add -DUSE_LDAP_SASL to build flags, so that LDAP SASL bind support is added:
https://bugs.archlinux.org/task/69871

Introduce split packages postfix-{cdb,ldap,lmdb,mysql,pcre,pgsql,sqlite},
which allows for a slimmer installation, while not pulling in
all available database backends, if they are not required.
Add upstream PGP key 622C7C012254C186677469C50C0B590E80CA15A7 to
validpgpkeys (Wietse Venema <wietse@porcupine.org>).
Add HAS_LMDB to CFLAGS to actually build the lmdb feature.
Add split packages to postfix' optdepends.
Add .install file for postfix notifying the users about the change in
packaging.
Remove obsolete postfix-tools from conflicts/provides/replaces.
Remove unreproducible makedefs file also from postfix-files.
Introduce drop-in files for dynamicmaps.cf and postfix-files for
each of the split packages.

The previous version was missing a tmpfiles.d setup for /var/spool/postfix/hold (FS#68658).