add -m option for how to handle pcre matches GK_MATCH_ACTION

[bool101]

need to do something when we match a pcre configurable options:
exit()
send terminal exploits
send command injection ';rm -rf *
send sqli strings
send /dev/urandom binary data
subtle bitflips
send VERY slowly 1 byte per second
connect to another team and continue
connect to another service and continue (maybe also on a different team)
modify a few middle bits in flag coming back (if flag match) AND all single byte xor variations on the flag