Merge branch 'maint'

* maint:
blame: prevent a segv when -L given start > EOF
git-push: document all the status flags used in the output
Fix parsing of imap.preformattedHTML and imap.sslverify
git-add documentation: Fix shell quoting example

diff --cc Documentation/git-add.txt
Simple merge

diff --cc Documentation/git-push.txt
Simple merge

diff --cc imap-send.c
Simple merge