testbench: add simple test for "stop" statement
nitfix testbench: remove leftover from initial testing
bugfix: segfault on startup when certain script constructs are used

e.g. "if not $msg ..."
Merge branch 'v7-stable' into v7-devel

Conflicts:
	ChangeLog
	plugins/imuxsock/imuxsock.c
testbench: add new test
Merge branch 'v7-stable' into v7-devel
Merge branch 'v7-devel'

Conflicts:
	ChangeLog