./pre-release pre-export
test/integration/test-apt-update-file: improve test
Fix regression when copy: is used for a relative path

When we do a ReverifyAfterIMS() we use the copy: method to
verify the hashes again. If the user uses -o Dir=./something/relative
this fails because we use the URI class in copy.cc that strips
away the leading relative part. By not using URI this is fixed.

Closes: #762160
German program translation update

Closes: 762223
disable timestamps in the footer of docs by doxygen

The default being 'yes', but this spoils the effort of reproducible
builds for no real gain. (https://wiki.debian.org/ReproducibleBuilds)
relax grep to support newer curl output format

Git-Dch: Ignore
generalize Acquire::GzipIndex
Fix regression for cdrom: sources from latest security update

Skip a reverify for cdrom: sources. The reverify step is actually
harmful here because the apt-cdrom add code uses the indexcopy.cc
which will "normalize" the Packages file from the cdrom when it
writes it to the local disk. This leads to changing the "MD5sum"
field (notice the lower case "s") on the cdrom Packages file to
a "MD5Sum" field on the local file in /var/lib/apt/lists. Which
of course alters the hash and makes apt fail to reverify the file.
Ensure that iTFRewritePackageOrder is "MD5sum" to match apt-ftparchive

The iTFRewritePackageOrder is used in indexcopy to copy and normalize
cdrom Packages files. This change will ensure that there is no
"normalization" that changes MD5sum -> MD5Sum which alters the hash
of the Packages file on disk (oh the irony).
rewrite compressed indexes test to check with all compressors

Git-Dch: Ignore
Merge remote-tracking branch 'donkult/feature/generalize-gzipindex' into debian/sid
Set STRIP_FROM_PATH for doxygen

Signed-off-by: Trần Ngọc Quân <vnwildman@gmail.com>