SMSC AT and PIN and quotation marks

Hello all,
today I tried to use a NOKIA GSM PCCard with Kannel. Unfortunately
it failed to work out of the box because the Nokia card did not accept
Kannels "AT+CPIN=1234" syntax. It requires the PIN to be in quotation marks,
e.g. AT+CPIN="1234". I know at least one other Mobile that requires
the quotation marks as well. 

I think the rationale behind this is that the PIN is actually a "password 
string" in ETSI speak and strings are supposed to be limted by quotation 
marks. I know a number of mobiles that accept both versions and none that 
breaks with quotation marks, so I would suggest to add the quotation marks 
to the code.

Regards
  Jörg