Comment 0 for bug 1165531

While using 6.1 mail_message to_email function I found that it does not
cope with all the possible names in the emaillist.

example: 'bla@2.ch' <bla@2.ch>, (bla@2.ch) <bla@2.ch>, "'bla@2.ch'" <bla@2.ch>, etc

The regexp in the function to_email of mail/mail_message.py should be enhanced that it also removes ", () and
even if the allowed '.