Signed-off-by: Lars Hjemli <hjemli@gmail.com>

We used to rely on the result from strncmp() without comparing the length of
the strings involved. Even worse, any single-character format specifier would
enable zip-format due to the optional '.'-prefix since the length of the
mask then would become zero.

Noticed-by: Evan Martin <sys@neugierig.org>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Otherwise, when you leave out a description for a repository, the NULL
default causes cgit to print out titles like "cgit - (null)".

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

When a commit or tag lacks author/committer/tagger timestamp, do not skip
the next line in the commit/tag object.

Also, do not bother to print timestamps with value 0 as it is close to certain
to be bogus.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

The testsuite revealed that cgit snapshots don't set any useful timestamp on
the files contained in the snapshot.

Cherry-picked-from: 2ff33a8a0405b420cd75e0e207c7efeecd6f130b
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

The cache-cleaning is potentially dangerous, so lets move it away from the
install target. A special emptycache target can be used to run the rm -rf.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

When the virtual-root was a single "/", it would be normalized to NULL due
to removal of trailing slashes, which in turn would fool us to belive that
we shouldn't generate virtual urls.

This makes the "/" normalize to "", effectively allowing virtual urls like
http://example.com/projectname to be generated without specifying the
full domain name as the virtual root.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Suggested-by: Olivier Ramonat <olivier@ramonat.fr>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>