DateTime::TimeZone to correctly detect the local timezone

Patch by Frédéric Buclin <LpSolit@gmail.com>
r=dkl, a=justdave

r=dkl, a=justdave

r=gerv, a=glob

r=dkl, a=glob

values to localconfig when the answers were supplied by an answer file.
r=LpSolit, a=justdave

r=glob a=justdave

r=gerv a=justdave

r=dkl a=justdave

r=dkl, a=glob

r=dkl, a=sgreen

r=sgreen a=justdave

r=simon, a=glob

r=dkl a=glob

r=dkl a=glob

r=gerv, a=sgreen

Bug 781672: checksetup.pl fails to check the version of the latest Apache2::SizeLimit release (it throws "Invalid version format (non-numeric data)")
r=dkl a=sgreen

r=gerv a=glob

r=glob,a=justdave

r=dkl a=LpSolit

Bug 848635: Old queries based on tags are no longer listed in the page footer by default when upgrading from 4.0 or older to 4.2
r=glob a=LpSolit

r=glob a=LpSolit

r/a=LpSolit

r=glob a=LpSolit

r=glob a=LpSolit

r=dkl a=LpSolit

r=wicked a=LpSolit

r=glob a=LpSolit

Bug 785283 - Support increased values for PASSWORD_SALT_LENGTH without breaking compat with old hashes
[r=LpSolit a=LpSolit]

r=dkl r=wurblzap a=LpSolit

r/a=LpSolit

r/a=LpSolit

r=glob a=LpSolit

r=glob a=LpSolit

r=glob a=LpSolit

Bug 604388 - Filenames used to store data for Old Charts should be based on product IDs, not names (avoid dataloss when renaming products).
r/a=LpSolit

r=wicked a=LpSolit

r=mkanat a=LpSolit

r/a=LpSolit