Bump version to 1.2.1

preparing for new release

clarify how the changes to nsh-dist.txt appear

update index.html and index.md tidy up basics.md to improve pagination add improved nsh manual examples

Update README.md to improve flow and readability of install instructions

Update README.md to reflect improvements to NSH make file and to reflect new integration scripts

fix handling of <ctrl> + <c> interruption that previously caused lock files to remain and prevent further editing The default SIGINT handler does the wrong thing when a file is currently locked for editing. Please try the diff below. ensure that edited files get unlocked if the user types Ctrl-C at prompt While editing files, temporarily disable the default SIGINT handler which does a long jump to displaying a command prompt. Otherwise we would jump away without removing our lock on the file and future attempts to edit the file would fail. Issue found by Tom Smyth. Fixed by stsp@ Thanks

This Makefile grammar fix makes our build system independent of 'make obj', which is now an entirely optional step.

improve accuracy of description of what happens nsh when you start it as root and non root user improved syntax compliance (cleaning up mandoc -Tlint nsh.8 output

The requirement to run 'make obj' before 'make' keeps getting in the way when nsh is compiled as part of the ports infrastructure.

extern.h depends on stdio.h because of FILENAME_MAX. wchar.h will stop pulling in stdio.h, hence break the build in utf8.c which will no longer pull in stdio.h. Patch by tb@

Spotted and reported by sonic ... fixed by stspdotname (thanks ) "LESSSECURE=1" environment variable used to disable shell through less pager

Written to support future rcctl support patches. ok chris

Fixes a divide-by-zero crash reported by sthen@. To reproduce: printf 'show\nshow run\n' > /tmp/nsh.script nsh -i /tmp/nsh.script ok chris

ok chris

This makes ctl handlers with 6 arguments work as expected. ok chris

fix motd permissions in integration scripts