getent: Add gshadow to known databases.

completions/getent

@@ -29,7 +29,7 @@ _getent()
                 awk '{ print $1 }' )" -- "$cur" ) )
             return 0
             ;;
-        aliases|shadow)
+        aliases|shadow|gshadow)
             COMPREPLY=( $( compgen -W "$( getent "$prev" | cut -d: -f1 )" \
                 -- "$cur" ) )
             return 0
@@ -40,7 +40,7 @@ _getent()
     if [ $cword -eq 1 ]; then
         COMPREPLY=( $( compgen -W 'passwd group hosts services protocols \
             networks ahosts ahostsv4 ahostsv6 aliases ethers netgroup rpc \
-            shadow' -- "$cur" ) )
+            shadow gshadow' -- "$cur" ) )
     fi
 } &&
 complete -F _getent getent