dovecot-pigeonhole: bump version to 0.4.18

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/dovecot-pigeonhole/dovecot-pigeonhole.hash

@@ -1,2 +1,2 @@
 # Locally computed after checking signature
-sha256 74d869c7532cbf4fe41e3cc95a1aa6ce32e98f4d423f0d099da1e0fba022dae3  dovecot-2.2-pigeonhole-0.4.17.tar.gz
+sha256 dd871bb57fad22795460f613f3c9484a8bf229272ac00956d837a34444f1c3a9  dovecot-2.2-pigeonhole-0.4.18.tar.gz

package/dovecot-pigeonhole/dovecot-pigeonhole.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-DOVECOT_PIGEONHOLE_VERSION = 0.4.17
+DOVECOT_PIGEONHOLE_VERSION = 0.4.18
 DOVECOT_PIGEONHOLE_SOURCE = dovecot-2.2-pigeonhole-$(DOVECOT_PIGEONHOLE_VERSION).tar.gz
 DOVECOT_PIGEONHOLE_SITE = http://pigeonhole.dovecot.org/releases/2.2
 DOVECOT_PIGEONHOLE_LICENSE = LGPL-2.1