Kill rel-exists sanity checks for 28, reinstate them later

Something that simple allows RapidApp to pass its tests without modifications
in other words - worth the pain
Remove unused leftover from c19ca6e80 - there was much flailing :(
The extra reltype flag is breaking some suites - make the full change

Might as well get this over with, still consistent with Swindon
Ensure proper behavior when quoting is *disabled* (wraps up 08ac7648)
"Fix" symptoms described in ba7892a8c4 (I still do not entirely get it)

Extra fail reports are:
http://www.cpantesters.org/cpan/report/f74def2b-6bfb-1014-b341-c67b58fe2ee5
http://www.cpantesters.org/cpan/report/3123ab19-6bf8-1014-b488-656aa945bbef