* libmisc/shell/shell_getchar.c: Minor change so dropping connection
while at prompt results in shell logging out and connection still
being available.
* libfs/src/nfsclient/src/librtemsNfs.h,
libfs/src/nfsclient/src/nfs.c: Remove CEXP references. CEXP is
external to RTEMS and even if in the cpukit it should not cross
reference in this way.
* libmisc/shell/shell_getchar.c: New. Taken from the monitor.
* libmisc/Makefile.am: Add shell_getchar.c and clean up a little
in the shell area.
* libmisc/shell/shell.c, libmisc/shell/shell.h: Add line editting
support.
