Update license, and unset RESTRICTED.
Documentation is lo longer included; see epsg-docs.
The new version has updated parameters and has rationalized the use of
terms "supersede", "retire" and "replace".
Version 6.11.1 is the current release of the EPSG dataset,
distributed in an MS Access 97 database and/or as SQL scripts.
It incorporates data received and verified since the release of
Version 6.11 in August 2006.
pkgsrc fixes: SUBST_* improvements (was patching nonexistent file)
