dovecot: Updated (2.1.7 -> 2.1.8)

mail/dovecot/dovecot.desc

@@ -33,10 +33,10 @@
 
 [L] LGPL MIT
 [S] Stable
-[V] 2.1.7
+[V] 2.1.8
 [P] X -----5---9 194.300
 
 [CV-URL] http://www.dovecot.org/download.html
 
-[D] 31583532 dovecot-2.1.7.tar.gz http://dovecot.org/releases/2.1/
+[D] 878918086 dovecot-2.1.8.tar.gz http://dovecot.org/releases/2.1/