Don't pacify unique monsters when untrapping them from web

doc/fixes3-7-0.txt

@@ -861,6 +861,7 @@ try to avoid locations with engraved Elbereth or scare monster scroll when
 	who are susceptible to those
 be more flexible when wishing checks for artifact name matches; now allows
 	"firebrand" or "fire-brand" to yield "Fire Brand"
+exclude unique monsters from pacification when untrapped from web
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository

src/trap.c

@@ -4704,6 +4704,7 @@ reward_untrap(struct trap* ttmp, struct monst* mtmp)
     if (!ttmp->madeby_u) {
         if (rnl(10) < 8 && !mtmp->mpeaceful && !helpless(mtmp)
             && !mtmp->mfrozen && !mindless(mtmp->data)
+            && unique_corpstat(mtmp->data)
             && mtmp->data->mlet != S_HUMAN) {
             mtmp->mpeaceful = 1;
             set_malign(mtmp); /* reset alignment */