* libmisc/Makefile.am, libmisc/shell/main_wkspaceinfo.c,
libmisc/shell/shell.c, libmisc/shell/shellconfig.h: Add route and
ifconfig commands. The code for these was previously in the
networking guide. Disable NFS filesystem mount until that code is in
cpukit.
* libmisc/shell/main_ifconfig.c, libmisc/shell/main_route.c: New files.
