fixed permission check for overwriting uploaded files

ChangeLog

@@ -19,6 +19,10 @@ Version NEXT
 	We can now reupload last block which can happen if fspd server is
 	  restarted and reply to upload command is lost on way from server
 	  to client.
+	Check for overwriting uploaded files in fspd was reversed by mistake.
+	  Now if you want to overwrite file you must have permission for
+	  deleting and adding files or be directory owner.
+	  if you want to overwrite 
 
 Version 2.8.1b25 - 10 Sep 2009
 	GNU autotools build system was entirely replaced by SCons

server/file.c

@@ -912,7 +912,7 @@ const char *server_install (PPATH * pp, unsigned long inet_num,
    }
 
   if(fexist(pp->fullp) &&
-	( (di->protection & DIR_DEL) || acc[0]=='O' )
+	( (di->protection & DIR_DEL)==0 && acc[0] != 'O')
     )
   {
       unlink(tname);