Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/dso/README

-NOTES
------
-
-I've checked out HPUX (well, version 11 at least) and shl_t is
-a pointer type so it's safe to use in the way it has been in
-dso_dl.c. On the other hand, HPUX11 support dlfcn too and
-according to their man page, prefer developers to move to that.
-I'll leave Richard's changes there as I guess dso_dl is needed
-for HPUX10.20.
-
-There is now a callback scheme in place where filename conversion can
-(a) be turned off altogether through the use of the
-    DSO_FLAG_NO_NAME_TRANSLATION flag,
-(b) be handled by default using the default DSO_METHOD's converter
-(c) overriden per-DSO by setting the override callback
-(d) a mix of (b) and (c) - eg. implement an override callback that;
-    (i) checks if we're win32 (if(strstr(dso->meth->name, "win32")....)
-        and if so, convert "blah" into "blah32.dll" (the default is
-        otherwise to make it "blah.dll").
-    (ii) default to the normal behaviour - we're not on win32, eg.
-         finish with (return dso->meth->dso_name_converter(dso,NULL)).
-