www/spawn-fcgi: port number not configurable in rc.conf

[Nicolas Thauvin <orgrim%orgrim.net@localhost>]

Hello,

due to a variable missing in the rc script, the listening port of 
spawn-fcgi job cannot be set in /etc/rc.conf.

The following patch adds the job_port "eval" for the port of the job 
configured in /etc/rc.conf:

======
--- files/spawnfcgi.sh.orig     2010-04-11 19:34:14.000000000 +0200
+++ files/spawnfcgi.sh  2010-04-11 19:35:05.000000000 +0200
@@ -40,6 +40,7 @@
                job_socket=$(eval echo \$${name}_${job}_socket)
                job_socket_mode=$(eval echo \$${name}_${job}_socket_mode)
                job_address=$(eval echo \$${name}_${job}_address)
+               job_port=$(eval echo \$${name}_${job}_port)
                job_children=$(eval echo \$${name}_${job}_children)
                job_php_children=$(eval echo \$${name}_${job}_php_children)

======

Also, I found the configuration not straight forward, what about a 
MESSAGE explaining it? for example: (sorry for my bad English)

===========================================================================
To configure spawn-fcgi jobs from /etc/rc.conf:

1) List the job to be started:

spawnfcgi=YES
spawnfcgi_jobs="job1 ... jobN"

2) Add options to each job in the form spawnfcgi_<job>_<option>, for 
example, if you use PHP:

spawnfcgi_jobX_command="/usr/pkg/libexec/cgi-bin/php"
spawnfcgi_jobX_args=""
spawnfcgi_jobX_user="php"
spawnfcgi_jobX_socket=""
spawnfcgi_jobX_address="127.0.0.1"
spawnfcgi_jobX_port="9000"
spawnfcgi_jobX_children="3"

The complete list of options can be found in the spawnfcgi rc script
===========================================================================

Nicolas