[Dovecot] group ownership of new shared folders

[Simon Michelson]

Between versions 1.0.4 and 1.0.5 there were some changes to the
way dovecot-shared group ownership is propogated into new maildirs.
Changing the group of new_dir/{tmp,new,cur} was added, but
changing the group of new_dir itself was removed.  As far as I
can tell, this latter change may have been accidental.

This patch puts the functionality back, in the 1.1 tree.

----------------------------------
# HG changeset patch
# User Simon Michelson <simon at inpher.com>
# Date 1214444574 -3600
# Branch HEAD
# Node ID 1dae5712e81daacb6923f500c0997aca6853ec3a
# Parent  3c06e14c4731ee1ffe6d8c36bbdc711e3190cb2c
reinstate code to apply gid of dovecot-shared to new maildir directory

diff -r 3c06e14c4731 -r 1dae5712e81d src/lib-storage/index/maildir/maildir-storage.c
--- a/src/lib-storage/index/maildir/maildir-storage.c   Tue Jun 24 13:37:55 2008 +0300
+++ b/src/lib-storage/index/maildir/maildir-storage.c   Thu Jun 26 02:42:54 2008 +0100
@@ -539,6 +539,10 @@ static int maildir_create_shared(struct 
                umask(old_mask);
                return -1;
        }
+        if (chown(dir, (uid_t)-1, gid) < 0) {
+               mail_storage_set_critical(storage,
+                               "chown(%s) failed: %m", dir);
+        }
        for (i = 0; i < N_ELEMENTS(maildir_subdirs); i++) {
                path = t_strconcat(dir, "/", maildir_subdirs[i], NULL);
                if (chown(path, (uid_t)-1, gid) < 0) {