Defines starting with `p' in bsd/netat/at

• __PAP__ bsd/netat/at/pap.h:41
• PAP_SOCKERR bsd/netat/at/at_pap.h:42
• PAP_TIMEOUT bsd/netat/at/pap.h:46
• P_NOEXIST bsd/netat/at/at_pap.h:43
• P_UNREACH bsd/netat/at/at_pap.h:44