Convert standard_kconfig() to argparse for better feedback

Stuff like this is not the pinnacle of helpful design, and hides that
the commands actually have long help texts (that can be viewed with
pydoc):

    $ ./menuconfig.py --help
    [Errno 2] No such file or directory: '--help'

Fix it by converting standard_kconfig() to argparse, and add a
'description' argument to it for the command-specific help text. --help
now shows the same help text shown by pydoc, and some other error
messages are improved as well.

Also fix some copy-paste errors and outdated paths in the help texts for
the all*config commands.

1 files changed, 1 insertions, 1 deletions

diff --git a/oldconfig.py b/oldconfig.py
index 042ab44..ae9bf6d 100755
--- a/oldconfig.py
+++ b/oldconfig.py
@@ -44,7 +44,7 @@ def _main():
     # visible symbols.
     global conf_changed
 
-    kconf = standard_kconfig()
+    kconf = standard_kconfig(__doc__)
     print(kconf.load_config())
 
     while True: