[sam] PATCH for Default values settings on first time

[Michal]

With this patch user has ready default values(if those are set in Horde 
Configuration of Spamassassin -> conf.xml -> conf.php) until he save his own, 
then are use just those and there are no more problems like Defang Mime always 
on etc.


spammassassin.php : 
http://horde.nantucketkiteboarding.com/sam/spamassassin.php.patch.txt

config/conf.xml :
http://horde.nantucketkiteboarding.com/sam/conf.xml.patch.txt


Also now will be really easy to add option to reset values to some defaults(I 
will probably try to finish that) .


Thanks

Michal