package/cvs: add license

package/cvs: add license

cvs is an old package, and it shows:

  - CVS is licensed under GPL-1.0+ as stated in README (referenced in source
    code) and COPYING files;

  - COPYING.LIB also give the terms of LGPL-2.0+, and is referenced by a
    few files, like lib/strnlen1.c, mostly vampirised rom older versions
    of the GNU C library (glibc);

  - additionally, the glob implementation was also grabbed from a more
    recent (but still old) glibc version, and is LGPL-2.1+, but there is
    no license file associated with it, so we use the header instead.

Also update indentation in hash file (two spaces)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[yann.morin.1998@free.fr:
  - LGPL-2.0+ is used, reference at least one file
  - LGPL-2.1+ is also used
  - reword commit log accordingly
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>