Add -f for filter with -a to kill-pane, kill-window, kill-session.

GitHub issue 4782.

tmux.1

@@ -1203,6 +1203,7 @@ Kill the
 server and clients and destroy all sessions.
 .It Xo Ic kill\-session
 .Op Fl aCg
+.Op Fl f Ar filter
 .Op Fl t Ar target\-session
 .Xc
 Destroy the given session, closing any windows linked to it and no other
@@ -1210,6 +1211,12 @@ sessions, and detaching all clients attached to it.
 If
 .Fl a
 is given, all sessions but the specified one is killed.
+When
+.Fl a
+is given,
+.Fl f
+specifies a filter.
+Only sessions for which the filter is true are killed.
 If
 .Fl g
 is given and the session is in a session group, all sessions in the group are
@@ -3115,6 +3122,7 @@ the marked pane is used rather than the current pane.
 .Tg killp
 .It Xo Ic kill\-pane
 .Op Fl a
+.Op Fl f Ar filter
 .Op Fl t Ar target\-pane
 .Xc
 .D1 Pq alias: Ic killp
@@ -3124,9 +3132,16 @@ The
 .Fl a
 option kills all but the pane given with
 .Fl t .
+When
+.Fl a
+is given,
+.Fl f
+specifies a filter.
+Only panes for which the filter is true are killed.
 .Tg killw
 .It Xo Ic kill\-window
 .Op Fl a
+.Op Fl f Ar filter
 .Op Fl t Ar target\-window
 .Xc
 .D1 Pq alias: Ic killw
@@ -3137,6 +3152,12 @@ The
 .Fl a
 option kills all but the window given with
 .Fl t .
+When
+.Fl a
+is given,
+.Fl f
+specifies a filter.
+Only windows for which the filter is true are killed.
 .Tg lastp
 .It Xo Ic last\-pane
 .Op Fl deZ