httpd libmysqlclient.so service failure after f17 upgrade

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http://forums.fedoraforum.org – I'm quite competent at searching out solutions from the incredibly helpful regular posters, but this one is eluding me. Upgraded from f14->f16->f17. Upgrades went well generally, had all server services disabled (httpd, fuppes, mysql, trasmission-daemon) Upon restarting httpd I get the following failure: httpd[8430]: httpd: Syntax error on line 207 of /etc/httpd/conf/httpd.conf: Syntax error on line 6 of /etc/httpd/conf.d/auth_mysql.conf: Cannot load /etc/httpd/modules/mod_auth_mysql.so into server: libmysqlclient.so.16: cannot open shared object file: No such file or directory (HowTos)