rebase: don't clobber wd on --abort when we've updated away (issue4009)

bookmarks: update only proper bookmarks on push -r/-B (issue 3973) Make push -r/-B update only these bookmarks that point to pushed revisions or their ancestors, so we can be sure that commit pointed by bookmark is present in the remote reposiory. Previously push tried to update all shared bookmarks.

checklink: work around sshfs brain-damage (issue3636) With the follow_symlinks option, sshfs will successfully create links while claiming it encountered an I/O error. In addition, depending on the type of link, it may subsequently be impossible to delete the link via sshfs. Our existing link to '.' will cause sshfs to think the link is a directory, and thus cause unlink to give EISDIR. Links to non-existent names or circular links will cause the created link to not even be visible. Thus, we need to create a new temporary file and link to that. We'll still get a failure, but we'll be able to remove the link.

import: cut commit messages at --- unconditionally (issue2148) We used to do this based on X-mailer: mentioning git, but git doesn't put X-mailer in its git-format-patch output.

win32: update Inno Setup installer script and extensions list

revert: fix largefiles breakage

revert: make backup when unforgetting a file (issue3423) This skips the backup if it would be a duplicate.

revsingle: fix silly API issue (issue2992)

Added signature for changeset f0d7721d7322

Added tag 2.7-rc for changeset f0d7721d7322