httpd libmysqlclient.so service failure after f17 upgrade

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

If I comment out line 6 of auth_mysql.conf, httpd will run.
If I try to connect to SquirrelMail, the login.php stalls with a blank screen , presumably dependant on the commented out include line.

ls -l /usr/lib/mysql

-rw-r--r--. 1 root root 2298 Sep 30 00:18 INFO_BIN
-rw-r--r--. 1 root root 202 Sep 30 00:18 INFO_SRC
lrwxrwxrwx. 1 root root 17 Oct 6 00:12 libmysqlclient_r.so -> libmysqlclient.so
lrwxrwxrwx. 1 root root 20 Oct 6 00:12 libmysqlclient.so -> libmysqlclient.so.18
-rwxr-xr-x. 1 root root 2904676 Sep 30 00:18 libmysqlclient.so.16
lrwxrwxrwx 1 root root 24 Oct 15 18:37 libmysqlclient.so.18 -> libmysqlclient.so.18.0.0
-rwxr-xr-x 1 root root 2904676 Sep 30 00:18 libmysqlclient.so.18.0.0
lrwxrwxrwx. 1 root root 18 Oct 6 00:15 libmysqld.so.0 -> libmysqld.so.0.0.1
-rwxr-xr-x. 1 root root 9945280 Sep 30 00:18 libmysqld.so.0.0.1
-rwxr-xr-x. 1 root root 12048 Sep 29 21:30 mysqlbug
-rwxr-xr-x. 1 root root 7125 Sep 30 00:18 mysql_config
drwxr-xr-x. 2 root root 4096 Oct 6 00:41 plugin

I have made a copy of -rwxr-xr-x 1 root root 2904676 Sep 30 00:18 libmysqlclient.so.18.0.0 as
-rwxr-xr-x. 1 root root 2904676 Sep 30 00:18 libmysqlclient.so.16

in the hope that it could be found, but this does not help.

Can't understand why it is looking for .so.16 when it should be looking for .so

mod_auth_mysql-3.0.0-12.fc14.i686 seems to be the latest version. Has it been abandoned?

• Am I barking up the wrong tree trying to get SquirrelMail working by exploring this path

• is the later version of httpd already dealing with sql authentication and therefore...

• is /etc/httpd/conf.d/auth_mysql.conf no longer needed