Add some missing option descriptions including the newly introduced one by
https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/merge_requests/185
.TP 8
.B \-\-gapless
Enable gapless playback
+.TP 8
+.B \-v, \-\-flags
+Control playback behaviour setting playbin 'flags' property
+.TP 8
+.B \-v, \-\-verbose
+Output status information and property notifications
+.TP 8
+.B \-q, \-\-quiet
+Do not print any output (apart from errors)
+.TP 8
+.B \-\-use\-playbin3
+Use playbin3 pipeline (default varies depending on 'USE_PLAYBIN' env variable)
+.TP 8
+.B \-\-wait\-on\-eos
+Keep showing the last frame on EOS until quit or playlist change command (gapless is ignored)
.SH "INTERACTIVE KEYBOARD CONTROL"
.l