Added --no-generate to "apt-cache pkgnames" calls (Debian: #547550)

From apt-cache(1):

       -g, --generate
           Perform automatic package cache regeneration, rather than use the
           cache as it is. This is the default; to turn it off, use
           --no-generate. Configuration Item: APT::Cache::Generate.

  Should make calls to apt-cache faster.

CHANGES

@@ -38,6 +38,8 @@ bash-completion (1.x)
   * Fixed obvious brokenness (typos) in contrib/mdadm
   * Clean [1.2.3.4]:port format in known_hosts, thanks to
     Xuefer (Gentoo: #284563)
+  * Added --no-generate to "apt-cache pkgnames" calls, make it faster
+    on certain configurations (Debian: #547550)
   * Patches from PLD Linux (thanks to Elan Ruusamäe):
     - avoid sed pipe as ps itself can omit the headers
     - improve service(8) completion, also look for "msg_usage"

contrib/apt

@@ -32,7 +32,7 @@ _apt_get()
 			return 0
 			;;
 		*)
-			COMPREPLY=( $( apt-cache pkgnames $cur 2> /dev/null ) )
+			COMPREPLY=( $( apt-cache --no-generate pkgnames $cur 2> /dev/null ) )
 			return 0
 			;;
 
@@ -118,7 +118,7 @@ _apt_cache()
 			;;
 
  		*)
-		    COMPREPLY=( $( apt-cache pkgnames $cur 2> /dev/null ) )
+		    COMPREPLY=( $( apt-cache --no-generate pkgnames $cur 2> /dev/null ) )
 		    return 0
 		    ;;