Fix SHARED_CORE feature for HPUX by backing-out a change (comitted

between 1.3.7 and 1.3.9) which changed the DSO extension from `sl' to
`so'. This worked only for modules (where we load the DSO manually),
but horribly fails under HPUX for DSO-based/shared libraries (where our
$SHLIB_SUFFIX_NAME is used, too).

Submitted by: Gary Silverman <gary.silverman@abnamro.com>
Reviewed by: Ralf S. Engelschall
PR: 4974


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@84176 13f79535-47bb-0310-9956-ffa450edef68