docs: document freecell --all

Based on a smaller patch developed by Moritoshi Oshiro:
https://bugzilla.redhat.com/show_bug.cgi?id=693963

* tools/virsh.pod (freecell): Mention all, and clarify that
optional cellno requires --cellno.

diff --git a/tools/virsh.pod b/tools/virsh.pod
index 9c42008301903890accf6a3e7751e70894b1b397..2a708f66035b7a3576d41be432f1098ce79d89bb 100644 (file)
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -314,10 +314,11 @@ crashed.
 
 =back
 
-=item B<freecell> optional I<cellno>
+=item B<freecell> optional { I<--cellno> B<cellno> | I<--all> }
 
 Prints the available amount of memory on the machine or within a
-NUMA cell if I<cellno> is provided.
+NUMA cell if I<cellno> is provided.  If I<--all> is provided instead
+of I<--cellno>, then show the information on all NUMA cells.
 
 =item B<cpu-baseline> I<FILE>