MT#60476 Deprecate ATTR_LABEL parsing

Because not specificially used in rtpengine,
just deprecate it. Not to be mixed with
the `label=xxx` usage via NG protocol.

This will be also required when switching to
the sdp create approach, because needs to be
delivered via generics to print out SDP.

No functional change. Tests had to be fixed accordingly,
because of the appeared offset in the list of attributes.

Additionally, tests containing coming SDP with a label,
but which are within inactive media, don't pass it further.
One single example of it is an answer case of "a=mid mixup" test.
This is because of `print_sdp_media_section()` specifics,
and only printing generics for active media sessions.

Change-Id: Iabb44adf17adb5d8e0c5bcad20f527b591b2222c

daemon/sdp.c

@@ -62,7 +62,6 @@ enum attr_id {
 	ATTR_T38MAXBITRATE,
 	ATTR_T38FAXMAXBUFFER,
 	ATTR_MAXPTIME,
-	ATTR_LABEL,
 	ATTR_TLS_ID,
 	ATTR_END_OF_CANDIDATES,
 };
@@ -1230,9 +1229,6 @@ static int parse_attribute(struct sdp_attribute *a) {
 		case CSH_LOOKUP("maxptime"):
 			a->attr = ATTR_MAXPTIME;
 			break;
-		case CSH_LOOKUP("label"):
-			a->attr = ATTR_LABEL;
-			break;
 	}
 
 	return ret;

t/auto-daemon-tests.pl

@@ -177,7 +177,6 @@ a=sendrecv
 a=rtcp:PORT
 m=video PORT RTP/AVP 99 97 126 123
 b=TIAS:5952000
-a=label:11
 a=mid:2
 a=rtpmap:99 H265/90000
 a=fmtp:99  level-id=90;max-lsr=125337600;max-lps=2088960;max-tr=22;max-tc=20;max-fps=6000;x-cisco-hevc=529
@@ -191,6 +190,7 @@ a=rtcp-fb:* ccm pan
 a=rtcp-fb:* nack pli
 a=rtcp-fb:* ccm fir
 a=rtcp-fb:* ccm tmmbr
+a=label:11
 a=answer:full
 a=extmap:4 http://protocols.cisco.com/timestamp#100us
 a=cisco-mari-psre:97 ltrf=3
@@ -647,7 +647,6 @@ a=ptime:20
 m=video 0 RTP/AVP 99 97 126 123
 c=IN IP6 2001:db8:4321::1
 b=TIAS:5952000
-a=label:11
 a=mid:2
 m=application 0 RTP/SAVP 96
 c=IN IP4 203.0.113.1
@@ -22755,7 +22754,6 @@ b=CT:10000000
 t=0 0
 m=audio PORT RTP/AVP 104 9 103 111 8 101
 c=IN IP4 203.0.113.1
-a=label:main-audio
 a=mid:1
 a=rtpmap:104 SILK/16000
 a=rtpmap:9 G722/8000
@@ -22765,6 +22763,7 @@ a=fmtp:111 bitrate=16000
 a=rtpmap:8 PCMA/8000
 a=rtpmap:101 telephone-event/8000
 a=fmtp:101 0-16
+a=label:main-audio
 a=sendrecv
 a=rtcp:PORT
 a=ptime:20