Merge pull request #292 from mcav/apop

Bug 983167 - [email/POP3] broken node-crypto.js shim causes auth failure...
Bug 986642 - [email/tests] Improve SMTP prober RCPT TO/MAIL FROM case to verify email address is propagated
Merge pull request #293 from asutherland/address-probe

Bug 986642 - [email/tests] Improve SMTP prober RCPT TO/MAIL FROM case to  verify email address is propagated. r=mcav
Bug 805501 - Support different username / password / credentials for SMTP server from IMAP server. r=asuth