Previously the cgi-user option in stargazer was broken in this module
because stargazer didn't have CAP_SETUID and CAP_SETGID. cgi-user tells
stargazer to run cgi processes as a different user. I added an option
allowCgiUser that give stargazer these capabilities when enabled. I made
this an option because access to those syscalls greatly increases the
damage a RCE bug in stargazer could do. So they should only be enabled
if needed.
