Merge remote-tracking branch 'origin/topic/seth/zeek_init'

* origin/topic/seth/zeek_init:
  Some more testing fixes.
  Update docs and tests for bro_(init|done) -> zeek_(init|done)
  Implement the zeek_init handler.

testing/btest/language/undefined-delete-field.zeek

@@ -7,7 +7,7 @@ type MyRecordType: record
 	b: count;
 	};
 
-event bro_init()
+event zeek_init()
 	{
 	local x = MyRecordType($a=1, $b=2);