maint: add myself to the copyright holders in posix.c.

* ext/posix/posix.c: Add myself to the copyright holders.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
maint: simplify installation instructions in README.md.

* README.md (Installation): Remove --server flag; moonscript.org
is checked automatically now.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>