Add "file not found" for rm

New commands: set, unset, history, export


git-svn-id: https://kippo.googlecode.com/svn/trunk@5 951d7100-d841-11de-b865-b3884708a8e2

core/cmdl.py

@@ -16,6 +16,10 @@ cmdl = {
     '/bin/mount':       base.command_mount,
     '/bin/pwd':         base.command_pwd,
     '/bin/uname':       base.command_uname,
+    'set':              base.command_nop,
+    'unset':            base.command_nop,
+    'history':          base.command_nop,
+    'export':           base.command_nop,
     '/bin/ls':          ls.command_ls,
     '/usr/bin/wget':    wget.command_wget,
     '/bin/tar':         tar.command_tar,