dovecot: Updated (2.0.19 -> 2.0.20)

mail/dovecot/dovecot.desc

@@ -33,10 +33,10 @@
 
 [L] LGPL MIT
 [S] Stable
-[V] 2.0.19
+[V] 2.0.20
 [P] X -----5---9 194.300
 
 [CV-URL] http://www.dovecot.org/download.html
 
-[D] 4247295866 dovecot-2.0.19.tar.gz http://dovecot.org/releases/2.0/
+[D] 3729388443 dovecot-2.0.20.tar.gz http://dovecot.org/releases/2.0/