New shell implementation is on the way. For now old one and all
references are kept to be gradually replaced by new shell.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
shell_exec expects a string that is null-terminated but if line passed
to strncpy is equal or bigger than the buffer it will not produce a
null-terminated command.
Jira: ZEP-2474
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>