Merge branch 'rl/send-email-aliases'

Merge branch 'rl/send-email-aliases'

"git send-email" now performs alias-expansion on names that are
given via --cccmd, etc.

This round comes with a lot more enhanced e-mail address parser,
which makes it a bit scary, but as long as it works as designed, it
makes it wonderful ;-).

* rl/send-email-aliases:
  send-email: suppress meaningless whitespaces in from field
  send-email: allow multiple emails using --cc, --to and --bcc
  send-email: consider quote as delimiter instead of character
  send-email: reduce dependencies impact on parse_address_line
  send-email: minor code refactoring
  send-email: allow use of aliases in the From field of --compose mode
  send-email: refactor address list process
  t9001-send-email: refactor header variable fields replacement
  send-email: allow aliases in patch header and command script outputs
  t9001-send-email: move script creation in a setup test