Allow -p PID to take comma or whitespace-separated list of PIDs

* defs.h: Clarify meaning of TCB_ATTACHED. No code changes.
* strace.c (process_opt_p_list): New function.
(main): Call process_opt_p_list to process -p PIDs argument.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2 files changed