- ffmpeg: add whitelist patch

package/ffmpeg/patches/ffmpeg-4.4-whitelist.patch

@@ -0,0 +1,19 @@
+diff --git a/libavformat/avio.c b/libavformat/avio.c
+index 4846bbd8c6..978bf72994 100644
+--- a/libavformat/avio.c
++++ b/libavformat/avio.c
+@@ -180,12 +180,12 @@ int ffurl_connect(URLContext *uc, AVDictionary **options)
+                (uc->protocol_whitelist && !strcmp(uc->protocol_whitelist, e->value)));
+     av_assert0(!(e=av_dict_get(*options, "protocol_blacklist", NULL, 0)) ||
+                (uc->protocol_blacklist && !strcmp(uc->protocol_blacklist, e->value)));
+-
++/*
+     if (uc->protocol_whitelist && av_match_list(uc->prot->name, uc->protocol_whitelist, ',') <= 0) {
+         av_log(uc, AV_LOG_ERROR, "Protocol '%s' not on whitelist '%s'!\n", uc->prot->name, uc->protocol_whitelist);
+         return AVERROR(EINVAL);
+     }
+-
++*/
+     if (uc->protocol_blacklist && av_match_list(uc->prot->name, uc->protocol_blacklist, ',') > 0) {
+         av_log(uc, AV_LOG_ERROR, "Protocol '%s' on blacklist '%s'!\n", uc->prot->name, uc->protocol_blacklist);
+         return AVERROR(EINVAL);