[Dovecot] v2.2 dsync_brain_lock() FLOCK compatibility issue on Solaris 11.1

Hello,

On Oracle Solaris 11.1 (Solaris gcc-45 package set) core libraries do not provide flock() anymore.

in file: src/doveadm/dsync/dsync-brain.c in function: dsync_brain_lock() around line: 234

is a (maybe unintentional) fix reference to FLOCK locks.

            if (file_wait_lock(brain->lock_fd, brain->lock_path, F_WRLCK,
                               FILE_LOCK_METHOD_FLOCK, brain->lock_timeout,
                               &brain->lock) <= 0) {

resulting in a runtime error about unsupported flock() locks. (HAVE_FLOCK is not set by configure script)

Personally, I have just changed "FLOCK" to "FCNTL".

[ I have tried brain->lock->lock_method but this seems not to be the correct way => compile time error: dereferencing pointer to incomplete type ]

Walter