-These are the values set with \fBset\-global\fR.
-.TP
-.B required\-tags
-If this is set an nonempty then randomly played tracks will always have at
-least one of the listed tags.
-.TP
-.B prohibited\-tags
-If this is set an nonempty then randomly played tracks will never have any of
-the listed tags.
-.TP
-.B playing
-If unset or \fByes\fR then play is enabled.
-Otherwise it is disabled.
-Use \fBdisable\fR rather than setting it directly.
-.TP
-.B random\-play
-If unset or \fByes\fR then random play is enabled.
-Otherwise it is disabled.
-Use \fBdisable\fR rather than setting it directly.
-.PP
-Global preferences starting '_' are read-only (in the sense that you cannot
-modify them; the server may modify them as part of its normal operation).
-They are:
-.TP
-.B _dbversion
-The database version string.
-This is used by DisOrder to detect when it must
-modify the database after an upgrade.