Feature Wish: RLimitMEM xxxx

Hello,

I would like to see a text field per vhost in the panel, that gives the
possibility to set:

----
RLimitMEM 200000000
-----

with a default settable in the configure -> apache menu. Without that
limit, a simple perl script can DoS your server by requesting a hughe
amount or RAM and the machine will swap and maybe OOM.....

According to http://httpd.apache.org/docs/1.3/mod/directives.html there
are three differnt kind of RLimit* directives which should be settable
in ISPMan:

# RLimitCPU
# RLimitMEM
# RLimitNPROC

As I said: It's a feature wish. If I try myself adding: Which of ISPMan
feature should i try to resemble? apacheScriptDirOptions ?