Description of problem:
Fedora patches master-settings.c to disable dotlocking on mboxes by default:

-       MEMBER(mbox_write_locks) "dotlock fcntl",
+       MEMBER(mbox_write_locks) "fcntl",

The patch, however, does not have an effect on the "deliver" program. It still attempts to use dotlocking by default, which results in errors if the user doesn't have write access to /var/mail. AFAICT, this is because "deliver" uses its own config parsing code which does not make use of master-settings.c.

To correct this, I believe src/lib-storage/index/mbox/mbox-lock.c also needs to be patched as follows:

-#define DEFAULT_WRITE_LOCK_METHODS "dotlock fcntl"
+#define DEFAULT_WRITE_LOCK_METHODS "fcntl"


Version-Release number of selected component (if applicable):
dovecot-1.2.13-1.fc13.i686

Steps to Reproduce:
1. Configure your MTA to use dovecot's "deliver" as the local delivery agent.
2. Send mail to a local user.
  
Actual results:
/var/log/maillog:
dovecot: deliver(username): file_dotlock_create(/var/mail/username) failed: Permission denied (euid=1234(username) egid=1234(username) missing +w perm: /var/mail) (set mail_privileged_group=mail)

Expected results:
It shouldn't be using dotlocking.