* fixes Undefined offset: 1 at lib/private/mail.php#143

remove magic handling of recipient lists by exploding the string - this functionality is nowhere used this way and nowhere documented - and broken because only $toaddress will be exploded not $toname

Conflicts:
	lib/private/vcategories.php

Conflicts:

	lib/mail.php

Conflicts:

	lib/mail.php

added parameter mail_smtpauthtype to set SMTP authentication type.

Added three additional mail_smtp.. parameters.
- mail_smtpdebug - enable debug messages to analyse SMTP problems.
- mail_smtptimeout - set SMTP timeout which is set to 10s by
  default and this is sometimes to short especially if a malware/
  spam scanner is used.
- mail_smtpsecure - force secure SMTP connections.

new OC_Mail class to handle all mail sending. The benefit is that is way mor flexible than the standard mail command. can be configured to use a remote smtp relay for example. also port the lostpassword code