Modify script mkautoconfamal.sh to use the download.html naming convention for the tar.gz it creates.
Fix a requirements comment in a test case.  No changes to the testcase
itself nor to any code.
Adjust #ifdefs to get SQLITE_OMIT_AUTOMATIC_INDEX and SQLITE_OMIT_PAGER_PRAGMAS
to build.
Add the sqlite3session_table_filter API to the sessions extension.
Merge recent trunk changes.