Add command arg for profiler toggle

[cliffordp]

if xdebug is off, profiling is off.

if xdebug is on, profiling may be on or off.

if xdebug is on, php runs slower. if xdebug profiling is on, php runs way slower.

so having a command argument/flag to switch profiling on/off while changing (or not) xdebug's on/off.