largefiles: remove a chunk of commented out code

Remove FSF mailing address from GPL headers The GPLv3 FAQ suggests to upgrade by [...] replace all your existing v2 license notices (usually at the top of each file) with the new recommended text available on the GNU licenses howto. It's more future-proof because it no longer includes the FSF's postal mailing address. This removes the postal address, but leaves the version number at 2+.

dispatch: lowercase abort message

merge with stable

commands: add link to addremove in commit help text

largefiles: display remote errors from putlfile (issue3123) (issue3149)

cmdutil: simplify duplicatecopies

hgcia: fix diffstat support

copies: rewrite copy detection for non-merge users The existing copy detection API was designed with merge in mind and was ill-suited for doing status/diff. The new pathcopies implementation gives more accurate, easier to use results for comparing two revisions, and is much simpler to understand. Test notes: - test-mv-cp-st.t results finds more renames in the reverse direction now - test-mq-merge.t was always wrong and duplicated a copy in diff that was already present in one of the parent revisions

copies: split the copies api for "normal" and merge cases (API)