mail/dovecot: give better error message(s) when there are configuration errors.

PR:		232785
Submitted by:	prj@rootwyrm.com

mail/dovecot/Makefile

@@ -8,7 +8,7 @@
 
 PORTNAME=	dovecot
 PORTVERSION=	2.3.3
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	mail ipv6
 MASTER_SITES=	https://www.dovecot.org/releases/2.3/
 

mail/dovecot/files/dovecot.in

@@ -60,6 +60,14 @@ for config in ${dovecot_config}; do
 	required_files="${config}"
 	command_args="-c ${config}"
 	if [ -s ${config} ]; then
+               ${command} ${command_args} -a 2>/dev/null
+                if [ $? -ne 0 ]; then
+                       echo "==Error=="
+                       echo "Configuration file check failed."
+                       # Use dovecot to print the config error.
+                       ${command} ${command_args} -a
+                       exit $?
+                fi
 		base_dir=$(${command} ${command_args} -a 2>/dev/null | /usr/bin/awk -F '= ' '/^base_dir =/ { print $2 }')
 		pidfile="${base_dir}/master.pid"
 	else