- I did a cleanup of the internal generic SSL layer and how the various SSL

libraries are supported. Starting now, each underlying SSL library support
  code does a set of defines for the 16 functions the generic layer (sslgen.c)
  uses (all these new function defines use the prefix "curlssl_"). This
  greatly simplified the generic layer in readability by involving much less
  #ifdefs and other preprocessor stuff and should make it easier for people to
  make libcurl work with new SSL libraries.

  Hopefully I can later on document these 16 functions somewhat as well.

  I also made most of the internal SSL-dependent functions (using Curl_ssl_
  prefix) #defined to nothing when no SSL support is requested - previously
  they would unnecessarily call mostly empty functions.

lib/qssl.h

@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -29,6 +29,7 @@
 
 #include "urldata.h"
 
+#ifdef USE_QSOSSL
 int Curl_qsossl_init(void);
 void Curl_qsossl_cleanup(void);
 CURLcode Curl_qsossl_connect(struct connectdata * conn, int sockindex);
@@ -49,4 +50,23 @@ ssize_t Curl_qsossl_recv(struct connectdata * conn, /* connection data */
 size_t Curl_qsossl_version(char * buffer, size_t size);
 int Curl_qsossl_check_cxn(struct connectdata * cxn);
 
+/* API setup for QsoSSL */
+#define curlssl_init Curl_qossl_init
+#define curlssl_cleanup Curl_qossl_cleanup
+#define curlssl_connect Curl_qossl_connect
+
+/*  No session handling for QsoSSL */
+#define curlssl_session_free(x)
+#define curlssl_close_all Curl_qsossl_close_all
+#define curlssl_close Curl_qsossl_close
+#define curlssl_shutdown(x,y) Curl_qsossl_shutdown(x,y)
+#define curlssl_set_engine(x,y) CURLE_FAILED_INIT
+#define curlssl_set_engine_default(x) CURLE_FAILED_INIT
+#define curlssl_engines_list(x) NULL
+#define curlssl_send Curl_qsossl_send
+#define curlssl_recv Curl_qsossl_recv
+#define curlssl_version Curl_qsossl_version
+#define curlssl_check_cxn(x) Curl_qsossl_check_cxn(x)
+#define curlssl_data_pending(x,y) 0
+#endif /* USE_QSOSSL */
 #endif