WT command breaking config listing

Running test_util02.py (or several other tests) fails on the encryption-api branch with:

test_util02.test_util02.test_load_process(SS), session.create: unknown configuration key: 'keyname'

It took a while to understand that util_load.c:config_update() is breaking the incoming config string of "encryption=(keyid=,name=)". It is converting it into "encryption=(keyname=)". This is due to "id" being part of the 'rmnames' list of strings.