Fixed mail download for mails with already CRLF.

(cherry picked from commit 6b96726436f7009d5addb0fc795743c193d2b2d2)

Conflicts:
	docs/HISTORY.txt
Update bootstrap.py

(cherry picked from commit 715a0a20a4cc93bdc6110f72ef390816f04b27c0)
Merge pull request #669 from 4teamwork/pg_3.4.2

Fixed mail download for mails with already CRLF.