options: make --hls-bitrate=max the default

The previous default ("no") seemed to be equivalent to "min" in practice
(though it might depend on the website, which is even worse).

Better just select the best stream by default.

DOCS/man/options.rst

@@ -3130,9 +3130,9 @@ Network
     by default. The option allows the following parameters:
 
     :no:        Don't do anything special. Typically, this will simply pick the
-                first audio/video streams it can find. (Default.)
+                first audio/video streams it can find.
     :min:       Pick the streams with the lowest bitrate.
-    :max:       Same, but highest bitrate.
+    :max:       Same, but highest bitrate. (Default.)
 
     The bitrate as used is sent by the server, and there's no guarantee it's
     actually meaningful.

options/options.c

@@ -729,6 +729,7 @@ const struct MPOpts mp_default_opts = {
     .demuxer_min_bytes = 0,
     .demuxer_min_secs = 0.2,
     .network_rtsp_transport = 2,
+    .hls_bitrate = 2,
     .demuxer_min_secs_cache = 2,
     .cache_pausing = 1,
     .chapterrange = {-1, -1},