SYSOP ARS keyword now applies to target user, not necessarily the user online

Altere reported that listing users with access to a sub-board with an Access
Requirement String (ARS) set to "SYSOP" would list all users as having access.
The problem was the use of the "SYSOP" macro which checks the *current* user
online (not the subject of the ARS check). Fixed by not using the SYSOP macro.

src/sbbs3/chk_ar.cpp

@@ -269,7 +269,7 @@ bool sbbs_t::ar_exp(const uchar **ptrptr, user_t* user, client_t* client)
 				else result=!_not;
 				break;
 			case AR_SYSOP:
-				if(!SYSOP)
+				if(user->level < SYSOP_LEVEL && !(sys_status & SS_TMPSYSOP))
 					result=_not;
 				else result=!_not;
 				break;