#17 Add perfdata for all plugins

[Anonymous]

I used netsaint for monitoring nearest all requipment
and server in our network. This is very good tool.
However, I used "process_host_perfdata" command to
dump all check result into mysql database. However, I
need to cut all value from Plugin Output" field before
pass those value to mrtg or rrdtool to generate
charts. This is very bad.

For example:
- plugin out = "PING OK - Packet loss = 0%, RTA = 0.14
ms".
- Cut value = to: 0.14
- Pass 0.14 to mrtg for generate chat.

Can someone help to modify all plugins to have
perfdata value return to netsaint console, so that I
can only make use of $PERFDATA$ marco for
process_host_perfdata command. This is many helpful
for netsaint users' life who can make use of data from
netsaint check result to provide reporting or charts.