fixes test_rebase_no_author_info when a valid ~/.gitconfig is found. ok stsp@

This adds a new flag, `got commit -A', that allows to specify the commit author but retains the "committer" (which is obtained as usual via GOT_AUTHOR, got.conf or git config.) with lots of help from and ok stsp

we were both too strict and too lose. To avoid breaking got object parser (and to some extent ours too) we need to ensure that there aren't any line feeds, extra < or > and no trailing gibberish. The '@' is not actually required in the email. various tweaks and ok stsp

GNU dd only accepts upper-case letters for the size units.

The idea is that got patch can simply look for a line such as: commit - abcde1234567... to find the merge base commit ID to show in diff3 conflict markers. got log -p now displays commit IDs in its diff header, instead ofl tree or blob IDs. ok op@

This brings the rest of the regression test scripts in line with patch.sh.

tweak and ok stsp@

ok tracey

ok stsp@

To avoid accidents commit -F opens the prepared log message in an editor so it can be reviewed before the commit is created. For non-interactive use the -N option is required in addition to -F. ok millert@

ok stsp