MCA: delete all remaining traces of microchannel bus support.
scripts/config: properly report and set string options
kbuild: all{no,yes,mod,def,rand}config only read files when instructed to.
kconfig: Add error handling to KCONFIG_ALLCONFIG
nconf: add u, d command keys in scroll windows
menuconfig: add u, d, q command keys in text boxes
scripts/config: fix double-quotes un-escaping
kconfig: allow long lines in config file
kconfig/nconf: fix compile with ncurses reentrant API
scripts/config: add option to undef a symbol
scripts/config: allow alternate prefix to config option symbol
scripts/config: add option to not upper-case symbols