[libvirt] [RFC Patch 3/3]virsh: Update virsh man page

[Supriya Kannery <supriyak linux vnet ibm com>]

Update virsh man page with usage of new env variables

Signed-off-by: Supriya Kannery <supriyak in ibm com>

---
 tools/virsh.pod |   30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

Index: libvirt/tools/virsh.pod
===================================================================
--- libvirt.orig/tools/virsh.pod
+++ libvirt/tools/virsh.pod
@@ -72,7 +72,7 @@ instead of the default connection.
 =item B<-d>, B<--debug> I<LEVEL>
 
 Enable debug messages at integer I<LEVEL> and above.  I<LEVEL> can
-range from 0 (default) to 5.
+range from 0 to 4 (default).
 
 =item B<-l>, B<--log> I<FILE>
 
@@ -1340,6 +1340,34 @@ of C<virsh>
 
 =over 4
 
+=item VIRSH_DEBUG=<0 to 4>
+
+Turn on verbose debugging of virsh commands. Valid levels are
+
+=item * VIRSH_DEBUG=0
+
+Messages at level ERROR
+
+=item * VIRSH_DEBUG=1
+
+Messages at levels WARNING and ERROR
+
+=item * VIRSH_DEBUG=2
+
+Messages at levels NOTICE, WARNING and ERROR
+
+=item * VIRSH_DEBUG=3
+
+Messages at levels INFO, NOTICE, WARNING and ERROR
+
+=item * VIRSH_DEBUG=4
+
+Messages at level DEBUG and all other lower levels.
+
+=item VIRSH_LOG_FILE=C<LOGFILE>
+
+The file to log virsh debug messages.
+
 =item VIRSH_DEFAULT_CONNECT_URI
 
 The hypervisor to connect to by default. Set this to a URI, in the same