Smack 4.0.6-SNAPSHOT
Fallback to host if DNS SRV lookup fails

Also fix javadoc for DNSUtil, _jabber SRV records are no longer tried.

Fixes SMACK-616.
Make digest() in EntityCapsManager synchronized

Fixes SMACK-617
Fix typo in smack-android/build.gradle
Add AbstractDebugger and JulDebugger

there was a lot of duplicate code in ConsoleDebugger and
AndroidDebugger, which resides now in AbstractDebugger. Those two and
the new JulDebugger subclass AbstractDebugger.
Add version.gradle
Smack 4.0.6
Merge tag '4.0.6'

Smack 4.0.6

Conflicts:
	smack-core/src/main/java/org/jivesoftware/smack/util/DNSUtil.java
	smack-extensions/src/main/java/org/jivesoftware/smackx/caps/EntityCapsManager.java
	version.gradle