more dav documentation

adds documentation for new dav features

fixes compatiblity with GNU tar's version of ustar

fixes some char type mismatch warnings

updates copyright notice

adds tag filters for push

dav-sync pull applies config tag filter now

adds syncdir config element for tag filters

moves tag filter to tags.c

fixes header include order (dav-sync)

adds remove-repository command

fixes tag filter evaluation not respecting mode for subfilter combination

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mercurial