Update to 1.4.3
- Add CONFLICTS_INSTALL
- Convert to options target helper
- Update WWW
Changes: https://trac.xapian.org/wiki/ReleaseOverview/1.4.3
https://trac.xapian.org/wiki/ReleaseOverview/1.4.2 https://trac.xapian.org/wiki/ReleaseOverview/1.4.1 https://trac.xapian.org/wiki/ReleaseOverview/1.4.0