Sphider 3.4.5-MB, SphiderLite 1.1.5 released

This release fixes problems with robots.txt files, removes obsolete database functions, and removes code deprecated in PHP 7.4 and removed in PHP 8. Barring surprises, both versions of Sphider should be PHP 8 compatible.

Maintenance releases for the PDO version of Sphider have ended and the PDO version has been removed from the general download library.