pcp2zabbix: read zabbix_port from conf file properly
pcp2zabbix: read zabbix_port from conf file properly

Minor output/whitespace tweaks as well.

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp