-** HAVE__DLOPEN is lame, but SCO has their dl* functions as _dl*, and
-** unless you include dlfcn.h you don't get the macros to mask them, and
-** autoconf fails to find them. No longer true as of 5.0.5.
-**
-** Anybody who wants to use this on SCO needs to have their configure.in
-** look for _dlopen() as well as dlopen()