Use posix keys for current shell environment instead of task variables. With
this patch the shell needs one posix-key and one posix-key-value-pair
configured.
Update documentation for the shell.
Adapt samples/fileio:
- Add necessary objects.
- Add login function and custom device name for better testing of the shell.
Script does what is expected and tries to do it as
smartly as possible.
+ remove occurrences of two blank comment lines
next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
contain CVS Ids
+ If the processing left a blank line at the top of
a file, it was removed.
* shell/.cvsignore, shell/Makefile.am, shell/memory.t,
shell/preface.texi, shell/shell.texi: Added much information the
Preface. Created initial version of Configuration and Intialization
chapter. Links are now complete from start to end of manual.
* shell/confinit.t: New file.
