Git Updates and Fixes

MediaWiki with "git fetch" & "git push". * "git merge" learned the "--edit" option to allow users to edit the merge commit log message. * "git rebase -i" can be told to use special purpose editor suitable only for its insn sheet via sequence.editor configuration variable. * "git send-email" learned to respond to "-h"(elp) requests. * "git send-email" allows the value given to sendemail.aliasfile to begin with "~/" to refer to the $HOME directory. * "git send-email" forces use of Authen::SASL::Perl to work around issues between Authen::SASL::Cyrus and AUTH PLAIN/LOGIN. * "git stash" learned "--include-untracked" option to stash away untracked/ignored cruft from the working tree. * "git submodule clone" does not leak an error message to the UI level unnecessarily anymore. * "git submodule update" learned to honor "none" as the value for submodule.<name>.update to specify that the named submodule should not be checked out by default. * When populating a new submodule directory with "git submodule init", the $GIT_DIR metainformation directory for submodules is created inside $GIT_DIR/modules/<name>/ directory of the superproject and referenced via the gitfile mechanism. This is to make it possible to switch between commits in the superproject that has and does not have the submodule in the tree without re-cloning. * "gitweb" leaked unescaped control characters from syntax hiliter outputs. * "gitweb" can be told to give custom string at the end of the HTML HEAD element. * "gitweb" now has its own manual pages. Also contains other documentation updates and minor code cleanups. Fixes since v1.7.7 ------------------ Unless otherwise noted, all fixes in the 1.7.7.X maintenance track are included in this release. * HTTP transport did not use pushurl correctly, and also did not tell what host it is trying to authenticate with when asking for credentials. (merge deba493 jk/http-auth later to maint). * "git blame" was aborted if started from an uncommitted content and the path had the textconv filter in effect. (merge 8518088 ss/blame-textconv-fake-working-tree later to maint). * Adding many refs to the local repository in one go (e.g. "git fetch" that fetches many tags) and looking up a ref by name in a repository with too many refs were unnecessarily slow. (merge 17d68a54d jp/get-ref-dir-unsorted later to maint). * Report from "git commit" on untracked files was confused under core.ignorecase option. (merge 395c7356 jk/name-hash-dirent later to maint). * "git merge" did not understand ":/<pattern>" as a way to name a commit. " "git push" on the receiving end used to call post-receive and post-update hooks for attempted removal of non-existing refs. (merge 160b81ed ph/push-to-delete-nothing later to maint). * Help text for "git remote set-url" and "git remote set-branches" were misspelled. (merge c49904e fc/remote-seturl-usage-fix later to maint). (merge 656cdf0 jc/remote-setbranches-usage-fix later to maint).

This release includes various updates to Git, such as new options for commands like git merge and git stash, improvements to git send-email and git submodule, and fixes for issues with HTTP transport, git blame, and git commit, as well as documentation updates and minor code cleanups.