pcp installation page could be rewritten to be more clear on host to be monitored vs host monitoring

[captainjs]

Hi,

https://pcp.io/docs/installation.html It suggests:

yum install pcp pcp-gui

I was told the gui is only required on machines where you want to inspect pcp archives... That could be made clearer.

I think it should be made clearer that the pcp package contains both what is required to be on monitored hosts and on hosts for monitoring.

Also, based on the architecture document: https://grafana-pcp.readthedocs.io/en/latest/architecture.html

It could be clearer to differentiate "monitored hosts" vs "hosts for monitoring".

Also, the installation document could be referring the pcp-zeroconf (or making a link to that page) as it's also important for easily installing and having a first hand experience.

Many thanks!