objcore: Rename the ABANDON flag to CANCEL

This is to avoid a confusion between cancelling a fetch from a client
transaction and abandoning a fetch from a backend transaction.

bin/varnishd/cache/cache_fetch.c

@@ -571,7 +571,7 @@ vbf_stp_fetchbody(struct worker *wrk, struct busyobj *bo)
 		est = 0;
 
 	do {
-		if (oc->flags & OC_F_ABANDON) {
+		if (oc->flags & OC_F_CANCEL) {
 			/*
 			 * A pass object and delivery was terminated
 			 * We don't fail the fetch, in order for HitMiss

bin/varnishd/cache/cache_hash.c

@@ -763,11 +763,11 @@ HSH_Fail(struct objcore *oc)
 }
 
 /*---------------------------------------------------------------------
- * Abandon a fetch we will not need
+ * Mark a fetch we will not need as cancelled
  */
 
 static void
-hsh_abandon(struct objcore *oc)
+hsh_cancel(struct objcore *oc)
 {
 	struct objhead *oh;
 
@@ -776,7 +776,7 @@ hsh_abandon(struct objcore *oc)
 	CHECK_OBJ(oh, OBJHEAD_MAGIC);
 
 	Lck_Lock(&oh->mtx);
-	oc->flags |= OC_F_ABANDON;
+	oc->flags |= OC_F_CANCEL;
 	Lck_Unlock(&oh->mtx);
 }
 
@@ -807,7 +807,7 @@ HSH_Cancel(struct worker *wrk, struct objcore *oc, struct boc *boc)
 		AN(oc->flags & OC_F_HFM);
 
 	if (boc != NULL) {
-		hsh_abandon(oc);
+		hsh_cancel(oc);
 		ObjWaitState(oc, BOS_FINISHED);
 	}
 

include/tbl/oc_flags.h

@@ -34,7 +34,7 @@ OC_FLAG(PURGED,		purged,		(1<<0))		//lint !e835
 OC_FLAG(BUSY,		busy,		(1<<1))
 OC_FLAG(HFM,		hfm,		(1<<2))
 OC_FLAG(HFP,		hfp,		(1<<3))
-OC_FLAG(ABANDON,	abandon,	(1<<4))
+OC_FLAG(CANCEL,		cancel,		(1<<4))
 OC_FLAG(PRIVATE,	private,	(1<<5))
 OC_FLAG(FAILED,		failed,		(1<<6))
 OC_FLAG(DYING,		dying,		(1<<7))