Fixed bug #51801: typolink.linkAccessRestrictedPages has no effect if RealURL is enabled
[BUGFIX] Respect excluded parameters on chash revalidation

When decoding the current URL, there might be GET vars that need
to be excluded from cHash calculation due to settings in the
t3lib_cacheHash object.
Reincerting a potentially cached cHash should only be done of
the remaining GET vars are meant to influence the cHash.

Change-Id: I310a9568f6ab679cdf6bbbd9990712936723ecfd
Resolves: #51287
Fixed bug #49019: Page caching does not work if cHash cache is disabled
[TASK] Check if the duplicate unique alias is a translation

The duplicate check does'nt check if the current alias is a translation
of an existing one. In this case I think the warning doesn't make sense.

Resolves: #48944
Change-Id: I8aff29e2260b7f8ab7fd86e18bc4d17acf2579bb
Fixed typo