Merge branch 'maint'

* maint:
  send-email: add transfer encoding header with content-type
  Doc fix for git-reflog: mention @{...} syntax, and <ref> in synopsys.
  config: clarify compression defaults
  config: correct core.loosecompression documentation

diff --cc Documentation/config.txt
Simple merge

diff --cc git-send-email.perl
Simple merge