Parse envelope address lists without spaces

[phi-gamma]

Address issue #22

The IMAP spec doesn’t allow spaces between address elements. Example envelope-to input from Cyrus:

``((NIL NIL "undisclosed-recipients" NIL)(NIL NIL NIL NIL))``

The parser trips over the second element:

IMAP Error: Decode error: Unexpected character '('
print_objs: internal error, uncaught exception:
            Failure("imap error")

because it expects a space or closing paren. This commit adds a labeled delim argument to the p_list pattern which specifies the (optional) delimiter byte. This then forms the base for both the p_list and p_address_list patterns.

[phi-gamma]

This derives both the spaced and unspaced list patterns from a common one which takes an optional delimiter argument (char, because that’s what’s needed at the moment).

[nojb]

Looks good, thanks a lot for your contribution!

[phi-gamma]

···<date: 2015-07-29, Wednesday>······

Looks good, thanks a lot for your contribution!

Thanks for writing the module in the first place ;)