Supported DB list - need update to link

Issue #1810 resolved
Former user created an issue

I noticed that the project site for pymssql (listed on and linked from http://www.sqlalchemy.org/docs/dbengine.html#supported-dbapis ) is now hosted on google code. Current link points to the sourceforge site.

The new link for the pymssql project should be: http://code.google.com/p/pymssql/