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Also fix some copy-paste errors and outdated paths in the help texts for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/guiconfig.py b/guiconfig.py
index 050789a..20ecfa1 100755
--- a/guiconfig.py
+++ b/guiconfig.py
@@ -95,7 +95,7 @@ an item will jump to it. Item values can be toggled directly within the dialog.\
 
 
 def _main():
-    menuconfig(standard_kconfig())
+    menuconfig(standard_kconfig(__doc__))
 
 
 # Global variables used below: