FEATURE: Allow to use regex in process name

[dmitryskorbovenko]

It is not enough to use "contains" in my case, that's why I've added it: I want to proxy apps on iOS simulators during ui tests runs. Simulators run in parallel, each simulator has separate proxy to collect separate logs, and app is reinstalled during run for each test, that's why path is changed for each test. I use it this way "mitmdump --mode local:"<SIMULATOR_UDID>.*MyAppName""