Update Snappy mail

Author: jaapmarcus

install/upgrade/upgrade.conf

@@ -53,7 +53,7 @@ pga_v='7.14.6'
 rc_v='1.6.5'
 
 # Set version of SnappyMail (Webmail) to update during upgrade if not already installed
-sm_v='2.29.1'
+sm_v='2.29.4'
 
 # Update the File Manager or it's configuration file
 # Check if Filegator requires an update based on current version and setting below