main/pbx: Resolve case sensitivity regression in PBX hints

When 8297136f was merged for ASTERISK-25040, a regression was introduced
surrounding the case sensitivity of device names within hints.
Previously, device names - such as 'sip/foo' - were compared in a case
insensitive fashion. Thus, 'sip/foo' was equivalent to 'SIP/foo'. After
that patch, only the case sensitive name would match, i.e., 'SIP/foo'.
As a result, some dialplan hints stopped working.

This patch re-introduces case insensitive matching for device names in
hints.

ASTERISK-25040

ASTERISK-25202 #close

Change-Id: If5046a7d14097e1e3c12b63092b9584bb1e9cb4c

main/pbx.c

@@ -1061,7 +1061,7 @@ static int hintdevice_cmp_multiple(void *obj, void *arg, int flags)
 		right_key = right->hintdevice;
 		/* Fall through */
 	case OBJ_KEY:
-		cmp = strcmp(left->hintdevice, right_key);
+		cmp = strcasecmp(left->hintdevice, right_key);
 		break;
 	default:
 		ast_assert(0);
@@ -1078,7 +1078,7 @@ static int hintdevice_remove_cb(void *obj, void *arg, void *data, int flags)
 	char *device = arg;
 	struct ast_hint *hint = data;
 
-	if (!strcmp(candidate->hintdevice, device)
+	if (!strcasecmp(candidate->hintdevice, device)
 		&& candidate->hint == hint) {
 		return CMP_MATCH;
 	}