...at least no non-bundled ones, see 9dfcee9266c9769153444cdcd4ab0e6e636c3eb6
"Not being able to honor a 'prefix' is a rather hard error" and the description
there how that can lead to a crash when using mysql-connector-ooo.oxt:  "'rm -rf
instdir/*/share/extensions/mysql-connector-ooo', 'instdir/*/program/soffice
workdir/*/Extension/mysql-connector.oxt', install the [extension] per-user, then
'File - New - Database - Connect to an existing database: MySQL - Next >> -
Connect directly - Next >> - Database name: foo - Server / Port - Server: bar -
Next >> - Test Connection', crash."

This is a partial revert of cd79d514 "prefix all
component_getFactory methods."

Change-Id: Ia7a6272eb0597e3b3bbf4ab333174b3232448539