package/dovecot: security bump to version 2.3.5.2

Fixes the following security issue:

* CVE-2019-10691: Trying to login with 8bit username containing
  invalid UTF8 input causes auth process to crash if auth policy is
  enabled. This could be used rather easily to cause a DoS. Similar
  crash also happens during mail delivery when using invalid UTF8 in
  From or Subject header when OX push notification driver is used.

https://dovecot.org/pipermail/dovecot-news/2019-April/000406.html

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/dovecot/dovecot.hash

@@ -1,5 +1,5 @@
 # Locally computed after checking signature
-sha256 d78f9d479e3b2caa808160f86bfec1c9c7b46344d8b14b88f5fa9bbbf8c7c33f  dovecot-2.3.5.1.tar.gz
+sha256 ba14e41aefd81a868a35b83bcb54194116106424d37690519b50ea83c0f31bf2  dovecot-2.3.5.2.tar.gz
 sha256 a363b132e494f662d98c820d1481297e6ae72f194c2c91b6c39e1518b86240a8  COPYING
 sha256 dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  COPYING.LGPL
 sha256 52b8c95fabb19575281874b661ef7968ea47e8f5d74ba0dd40ce512e52b3fc97  COPYING.MIT

package/dovecot/dovecot.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 DOVECOT_VERSION_MAJOR = 2.3
-DOVECOT_VERSION = $(DOVECOT_VERSION_MAJOR).5.1
+DOVECOT_VERSION = $(DOVECOT_VERSION_MAJOR).5.2
 DOVECOT_SITE = https://www.dovecot.org/releases/$(DOVECOT_VERSION_MAJOR)
 DOVECOT_INSTALL_STAGING = YES
 DOVECOT_LICENSE = LGPL-2.1, MIT, Public Domain, BSD-3-Clause, Unicode-DFS-2015