Document --exclude option a little better for ifupdown2

Ticket: CM-6587
Reviewed By: roopa
Testing Done: checked man paged

If we do an ifdown on all ports and try to exclude a bond or bridge port.
But we also have an iface defined for swp1 or swp4
(even if these are empty).
The lower interfaces will not be excluded. So if we
do an "ifdown -a -X bridge", swp ports in the bridge or bond
will go down effectively bringing a bond or bridge down.

This patch simply adds some documentation to the man pages.

ifupdown2 never follows dependents if the user has given an
interface list (unless explicitly requested with --with-depends
option which is available with some options).

man.rst/ifquery.8.rst

@@ -60,6 +60,10 @@ OPTIONS
     -X EXCLUDEPATS, --exclude EXCLUDEPATS
                           Exclude interfaces from the list of interfaces to
                           operate on. Can be specified multiple times
+                          If the excluded interface has dependent interfaces,
+                          (e.g. a bridge or a bond with multiple enslaved interfaces)
+                          then each dependent interface must be specified in order
+                          to be excluded.
 
     -i INTERFACESFILE, --interfaces INTERFACESFILE
                           Use interfaces file instead of default

man.rst/ifreload.8.rst

@@ -55,6 +55,10 @@ OPTIONS
     -X EXCLUDEPATS, --exclude EXCLUDEPATS
                           Exclude interfaces from the list of interfaces to
                           operate on. Can be specified multiple times
+                          If the excluded interface has dependent interfaces,
+                          (e.g. a bridge or a bond with multiple enslaved interfaces)
+                          then each dependent interface must be specified in order
+                          to be excluded.
 
 
 EXAMPLES

man.rst/ifup.8.rst

@@ -82,6 +82,10 @@ OPTIONS
     -X EXCLUDEPATS, --exclude EXCLUDEPATS
                           Exclude interfaces from the list of interfaces to
                           operate on. Can be specified multiple times
+                          If the excluded interface has dependent interfaces,
+                          (e.g. a bridge or a bond with multiple enslaved interfaces)
+                          then each dependent interface must be specified in order
+                          to be excluded.
 
     -i INTERFACESFILE, --interfaces INTERFACESFILE
                           Use interfaces file instead of default