Merge branch 'dd/mailinfo-quoted-cr'

Merge branch 'dd/mailinfo-quoted-cr'

"git mailinfo" (hence "git am") learned the "--quoted-cr" option to
control how lines ending with CRLF wrapped in base64 or qp are
handled.

* dd/mailinfo-quoted-cr:
  am: learn to process quoted lines that ends with CRLF
  mailinfo: allow stripping quoted CR without warning
  mailinfo: allow squelching quoted CRLF warning
  mailinfo: warn if CRLF found in decoded base64/QP email
  mailinfo: stop parsing options manually
  mailinfo: load default metainfo_charset lazily