Replace local case-insensitive argument comparison helpers in MAP, SLIST,
WHOAMI and NWTESTS with the shared tool_strsame() helper.
This removes small duplicate helpers without changing command parsing behavior.
Trustee-specific wrappers and the experimental NCOPY code are intentionally
left untouched.
Add GPL-2-or-later license headers to the DOS utility source files and
document the purpose and local dependencies of each C, header and assembler
file.
Preserve the original Martin Stover copyright attribution for the historic
MARS-NWE utility sources, including files that did not previously carry an
explicit header but are part of the original tool set. Add Mario Fetka as the
2026 copyright holder for the current maintenance work, and use Mario-only
headers for files without original Martin Stover ownership.
Also add a root-level COPYING file containing the GPL-2 license text.
Add the CREATOR utility and wire it into the DOS tools build and NET
command dispatch.
Extend the client-side NCP helpers with the calls needed by the new and
updated tools, including DOS namespace information and effective-rights
queries. Also update MAP handling for automatic drive mappings used by
the login script.
This commit contains the tool/source support only. The DOS baseline test
suite is kept separate and will be added in a follow-up commit.
