dovecot: update to version 2.3.11.3 (security fix)

Fixes:
CVE-2020-12100
CVE-2020-12673
CVE-2020-12674

Signed-off-by: Jan Pavlinec <jan.pavlinec@nic.cz>

mail/dovecot/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=dovecot
-PKG_VERSION:=2.3.10.1
+PKG_VERSION:=2.3.11.3
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://dovecot.org/releases/2.3
-PKG_HASH:=6642e62f23b1b23cfac235007ca6e21cb67460cca834689fad450724456eb10c
+PKG_HASH:=d3d9ea9010277f57eb5b9f4166a5d2ba539b172bd6d5a2b2529a6db524baafdc
 
 PKG_MAINTAINER:=Lucian Cristian <lucian.cristian@gmail.com>
 PKG_LICENSE:=LGPL-2.1-only MIT BSD-3-Clause