openssl: remove most BoringSSL #ifdefs.

As of https://boringssl-review.googlesource.com/#/c/6980/, almost all of
BoringSSL #ifdefs in cURL should be unnecessary:

- BoringSSL provides no-op stubs for compatibility which replaces most
  #ifdefs.

- DES_set_odd_parity has been in BoringSSL for nearly a year now. Remove
  the compatibility codepath.

- With a small tweak to an extend_key_56_to_64 call, the NTLM code
  builds fine.

- Switch OCSP-related #ifdefs to the more generally useful
  OPENSSL_NO_OCSP.

The only #ifdefs which remain are Curl_ossl_version and the #undefs to
work around OpenSSL and wincrypt.h name conflicts. (BoringSSL leaves
that to the consumer. The in-header workaround makes things sensitive to
include order.)

This change errs on the side of removing conditionals despite many of
the restored codepaths being no-ops. (BoringSSL generally adds no-op
compatibility stubs when possible. OPENSSL_VERSION_NUMBER #ifdefs are
bad enough!)

Closes #640

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/curl_des.h b/lib/curl_des.h
index 632c38432..129060ff7 100644
--- a/lib/curl_des.h
+++ b/lib/curl_des.h
@@ -24,11 +24,11 @@
 
 #include "curl_setup.h"
 
-#if defined(USE_NTLM) && !defined(HAVE_DES_SET_ODD_PARITY)
+#if defined(USE_NTLM) && !defined(USE_OPENSSL)
 
 /* Applies odd parity to the given byte array */
 void Curl_des_set_odd_parity(unsigned char *bytes, size_t length);
 
-#endif /* USE_NTLM && !HAVE_DES_SET_ODD_PARITY */
+#endif /* USE_NTLM && !USE_OPENSSL */
 
 #endif /* HEADER_CURL_DES_H */