sysutils/logwatch: Update 7.13 => 7.14

Commit log:
https://sourceforge.net/p/logwatch/git/ci/93cb38bb54f0ca12f4e792d9167993c9213e2c66/log/

• Remove no longer needed files/pkg-message.in and files/patch-scripts_services_postfix.
• Optimize post-install-DOCS-on.

PR: 292655