changes needed by openssl-0.9.8

A few changes are needed for ruby to compile with the newly-released
openssl-0.9.8, and I thought I'd post them here in case it saves someone
else looking for them.

1. Whenever you #include <openssl/md5.h>, <openssl/ripemd.h> or
<openssl/sha.h>, you first have to #include <sys/types.h>. This is because
these headers now reference size_t without pulling in <sys/types.h>
themselves.

[Perhaps this will be treated as a bug in openssl and fixed]

2. There's been a change to the structure of certificate validation flags. I
just made this quick change to allow it to compile:

--- ruby-1.8.2.orig/ext/openssl/ossl_x509store.c	Sun Dec 19 08:28:32 2004
+++ ruby-1.8.2/ext/openssl/ossl_x509store.c	Wed Jul  6 14:06:10 2005
@@ -538,7 +538,7 @@
 
     if(NIL_P(time)) {
 	GetX509StCtx(self, store);
-	store->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
+	store->param->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
     }
     else {
 	long t = NUM2LONG(rb_Integer(time));

However I'm not sure if this is right (e.g. should it check store->param is
non-null first?), and in any case, a conditional compile on the openssl
version will now be required.

Regards,

Brian.