Merge branch 'obsd-master'

tmux.1

@@ -934,6 +934,30 @@ If
 is given, no error will be returned if
 .Ar path
 does not exist.
+.Pp
+Within a configuration file, commands may be made conditional by surrounding
+them with
+.Em %if
+and
+.Em %endif
+lines.
+The argument to
+.Em %if
+is expanded as a format and if it evaluates to false
+.Ns ( Ql 0
+or empty), subsequent lines are ignored until
+.Em %endif .
+For example:
+.Bd -literal -offset indent
+%if #{==:#{host},myhost}
+set -g status-style bg=red
+%endif
+.Ed
+.Pp
+Will change the status line to red if running on
+.Ql myhost .
+.Em %if
+may not be nested.
 .It Ic start-server
 .D1 (alias: Ic start )
 Start the
@@ -3401,6 +3425,21 @@ is enabled, or
 .Ql no
 if not.
 .Pp
+Simple comparisons may be expressed by prefixing two comma-separated
+alternatives by
+.Ql ==
+or
+.Ql !=
+and a colon.
+For example
+.Ql #{==,#{host},myhost}
+will be replaced by
+.Ql 1
+if running on
+.Ql myhost ,
+otherwise by
+.Ql 0.
+.Pp
 A limit may be placed on the length of the resultant string by prefixing it
 by an
 .Ql = ,