stunnel: bump to version 4.56

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/stunnel/stunnel.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-STUNNEL_VERSION = 4.55
+STUNNEL_VERSION = 4.56
 STUNNEL_SITE = http://ftp.nluug.nl/pub/networking/stunnel/archive/4.x/
 STUNNEL_DEPENDENCIES = openssl
 STUNNEL_CONF_OPT = --with-ssl=$(STAGING_DIR)/usr --with-threads=fork