mail/mailman: fix some permission issues, realign template policy

- tighten up permissions on install dirs even more, patching
  bin/check_perms to not complain - fewer directories or files belong
  in mailman's hand or need group write permissions.

- revert 2.1.30's "make templates samples" because the upstream has
  always instead provided a templates/site dir here and warned users that
  default templates will be overwritten on updates or reinstallation
  https://wiki.list.org/DOC/4.48%20How%20can%20I%20change%20the%20HTML%20or%20.txt%20templates%20used%20by%20my%20mailing%20lists%3F
  changed templates will be written to different directories, the site,
  domain-specific or list-specific directory

- adjust pkg-plist such that a no-script install, a regular install
  with post-install script run, and check_perms agree on permissions,
  however with tighter write permissions than the default install,
  as a security-in-depth safety precaution. [1]

- revise files/pkg-install.in accordingly

- boil down files/pkg-message.in texts a little bit

- bump PORTREVISION

PR:		245853
Reported by:	manu@ (IRC) [1]

1 files changed, 10 insertions, 5 deletions

diff --git a/mail/mailman/files/patch-bin_check__perms b/mail/mailman/files/patch-bin_check__perms
index 0295e96d4faa..a0946b8ff9ed 100644
--- a/mail/mailman/files/patch-bin_check__perms
+++ b/mail/mailman/files/patch-bin_check__perms
@@ -7,19 +7,24 @@ permissions.
 
 -- Matthias Andree (mandree@FreeBSD.org, 2020-04-14)
 
---- bin/check_perms.orig	2020-04-13 17:08:14 UTC
-+++ bin/check_perms
-@@ -143,6 +143,9 @@ def checkwalk(arg, dirname, names):
+--- bin/check_perms.orig	2020-04-13 19:08:14.000000000 +0200
++++ bin/check_perms	2020-04-25 17:50:19.448831000 +0200
+@@ -143,6 +143,14 @@ def checkwalk(arg, dirname, names):
          elif (os.path.commonprefix((path, mm_cfg.QUEUE_DIR))
                == mm_cfg.QUEUE_DIR):
              targetperms = QFILEPERMS
-+        elif path == mm_cfg.PREFIX or '/messages' in path:
++        elif (path == mm_cfg.PREFIX or os.path.split(path)[1] in
++              ('archives', 'bin', 'cgi-bin', 'cron', 'icons', 'mail', 'scripts',)
++              or '/messages' in path
++              or '/templates' in path
++              or '/tests' in path
++              or '/Mailman' in path):
 +            # don't require LC_MESSAGES to be group writable
 +            targetperms = DIRPERMS & ~S_IWGRP & ~S_ISGID
          else:
              targetperms = DIRPERMS
          octperms = oct(targetperms)
-@@ -195,7 +195,7 @@
+@@ -192,7 +200,7 @@ def checkall():
              if e.errno <> errno.ENOENT: raise
              print C_('WARNING: directory does not exist: %(d)s')
              continue