lib/vserver.in [init_vservers] : test in a stricter way the real vservers availability

ChangeLog

@@ -29,6 +29,7 @@ version 0.9.3 -- unreleased
     lib changes
 	vserver:
 	 . improved VROOTDIR detection
+	 . test in a stricter way the real vservers availability
     known bugs:
         easydialog: 
          . formDisplay does not return exit status.

lib/vserver.in

@@ -41,6 +41,16 @@ init_vservers() {
    host_or_vservers=host
    # check vservers real availability
    if [ $vservers = yes ]; then
+      if [ ! -x "$VSERVERINFO" ]; then
+         `if [ "$arg" = nodialog ]; then echo fatal; else echo "msgBox warning"; fi` \
+            "vservers enabled in $conffile, but vserver-info command was not found. Please set the VSERVERINFO configuration variable to its full path."
+            return
+      fi
+      if [ ! -x "$VSERVER" ]; then
+         `if [ "$arg" = nodialog ]; then echo fatal; else echo "msgBox warning"; fi` \
+            "vservers enabled in $conffile, but vserver command was not found. Please set the VSERVER configuration variable to its full path."
+            return
+      fi
       if [ -z "$VROOTDIR" ]; then
          `if [ "$arg" = nodialog ]; then echo fatal; else echo "msgBox warning"; fi` \
             "vservers enabled in $conffile, but VROOTDIR is not set and could not be guessed."