hgweb: skip body creation of HEAD for most requests
The body is thrown away anyway, so this just wastes a lot of CPU time.
In the case of /archive/, this skips manifest processing and the actual
file archiving, resulting in a huge difference.
The most tricky part here is skipping the Content-Length creation as it
would indicate the output size for the corresponding GET request.
Added signature for changeset
59466b13a3ae
Added tag 6.3.2 for changeset
59466b13a3ae
filemerge: fix crash when using filesets in [partial-merge-tools]
Without this patch, you'd get `mercurial.error.ProgrammingError: fileset
expression with no context`.