license change

Would it be possible to replace the current Zlib License with a very similar, copyfree-certified license? The Zlib License has been rejected for copyfree certification because of what appears to be a bookkeeping clause:

> Zlib License restriction 2 contains the requirement "Altered source versions must be plainly marked as such," which could reasonably be interpreted by the courts in a manner that violates Copyfree Standard Definition point 3. Free Modification and Derivation. Alternatively, it may be interpreted as merely requiring that a derivative or modified work be renamed, given the concluding clause, "must not be misrepresented as being the original software." Until such issues are clarified, particularly as to the intent of the license authors and the legal applicability of these terms as explained by relevant legal professionals, the Zlib License must be regarded as contrary in some respects to the requirements of the Copyfree Standard Definition.

The most similar copyfree-certified licenses appear to be the [General Attribution License](http://copyfree.org/licenses/gal/license.txt) and the [Software Attribution License](http://copyfree.org/licenses/sal/license.txt). The two are almost identical, with the exception that the SAL very specifically mentions "software" and "source", while the GAL is . . . well, more general, and probably preferable overall.