Fixes #2057 (broken internet archive links)
Including internet archive url test in existing test_parse_url function
Adding single quote anchor to parse_url unit test
Add test for = lookbehind
Merge branch 'pr5416' into 1.8
Fixes #5490 log table deletion works now
Fixes #5479 adds group full text index if missing
Refs #5491 temporary fix for bad can_edit_extender() logic
Merge pull request #5499 from cash/group_fulltext_index

Fixes #5479 adds group full text index if missing
Merge pull request #5500 from cash/fix_infinite_loop

Refs #5491 temporary fix for bad can_edit_extender() logic
Merge branch '1.8'

Conflicts:
	engine/lib/extender.php