* Changed HTTP authentication code to a modular one.
* Added SASL support for HTTP authentication.
* Fixed compilation issues with libpng 1.5.x.
And other, while here GROFF is not needed, change
configure style, add rc.d(8) script, and edd@ drop
maintership, I take care of this now.
Tested on amd64 and i386.
Ok edd@
