Make HPUX use the default .so extension for DSO modules.

The right way to do this is probably to propagate the use of SHLIB_EXT_NAME
throughout the configuration process, but we have used .so forever for HPUX
without any problem and a change of the code to do this The Right Way would
be too risky at this late stage.

Problem solved. Lets roll.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83692 13f79535-47bb-0310-9956-ffa450edef68