1. There is no access to ParenMatching from the
"Configure Idle" pannel.
2. One need to edit both the global configuration file
in idlelib or idleforklib, and the local configuration
file (in .idlerc, under linux) in order to enable this
3. When ParenMatching is enabled, python complains
about missing AutoIndent module. I solved this problem
by copying AutoIndent.py from the idle directory.