transport-xmpp: Add MultiUserChatManager to disabled Smack classes
transport-xmpp: Remove unnecessary code

StrictHostnameVerifier is set by smack-android's initializer.
module-smssend: Fix NPE

Appears to be caused when contacts.size > 1 *and* useBestContactEnabled
== true, which would make it possible that getBestNumber() returns null.

java.lang.NullPointerException
	at org.projectmaxs.module.smssend.commands.SmsSend.execute(SmsSend.java:73)
	at org.projectmaxs.shared.module.MAXSModuleIntentService.onHandleIntent(MAXSModuleIntentService.java:168)
	at org.projectmaxs.shared.module.MAXSModuleIntentService$ServiceHandler.handleMessage(MAXSModuleIntentService.java:71)
Add scripts/installNightlies.sh