Issue #2362845 by thehyperlink. Check all menu_router callback columns.
Issue #2361975 by helmo. Use hashes to whitelist known OK but later removed files.
Issue #2364993 by scor. Additional suspicious usernames.
Whitelist legacy themes/tests/test_theme/template.php
Merge remote-tracking branch 'origin/7.x-1.x' into 7.x-1.x-dev

Conflicts:
	checks/suspicious_files_check.inc
Clean up exceptions list and add comments.