docs: update sourceforge project links [ci skip]

SourceForge projects can now choose between two hostnames, with .io and
.net ending. Both support HTTPS by default now. Opening the other variant
will perm-redirected to the one chosen by the project.

The .io -> .net redirection is done insecurely.

Let's update the URLs to point to the current canonical endpoints to
avoid any redirects.

Closes #9630

lib/curl_des.c

@@ -41,7 +41,7 @@
  *
  * The function is a port of the Java based oddParity() function over at:
  *
- * https://davenport.sourceforge.io/ntlm.html
+ * https://davenport.sourceforge.net/ntlm.html
  *
  * Parameters:
  *

lib/curl_ntlm_core.c

@@ -29,7 +29,7 @@
 /*
  * NTLM details:
  *
- * https://davenport.sourceforge.io/ntlm.html
+ * https://davenport.sourceforge.net/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 

lib/curl_ntlm_wb.c

@@ -30,7 +30,7 @@
 /*
  * NTLM details:
  *
- * https://davenport.sourceforge.io/ntlm.html
+ * https://davenport.sourceforge.net/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 

lib/http_ntlm.c

@@ -29,7 +29,7 @@
 /*
  * NTLM details:
  *
- * https://davenport.sourceforge.io/ntlm.html
+ * https://davenport.sourceforge.net/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 

lib/vauth/ntlm.c

@@ -29,7 +29,7 @@
 /*
  * NTLM details:
  *
- * https://davenport.sourceforge.io/ntlm.html
+ * https://davenport.sourceforge.net/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 
@@ -600,7 +600,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
 
     /* A safer but less compatible alternative is:
      *   Curl_ntlm_core_lm_resp(ntbuffer, &ntlm->nonce[0], lmresp);
-     * See https://davenport.sourceforge.io/ntlm.html#ntlmVersion2 */
+     * See https://davenport.sourceforge.net/ntlm.html#ntlmVersion2 */
   }
 
   if(unicode) {

lib/vauth/ntlm.h

@@ -34,7 +34,7 @@
 /* Stuff only required for curl_ntlm_msgs.c */
 #ifdef BUILDING_CURL_NTLM_MSGS_C
 
-/* Flag bits definitions based on https://davenport.sourceforge.io/ntlm.html */
+/* Flag bits definitions based on https://davenport.sourceforge.net/ntlm.html */
 
 #define NTLMFLAG_NEGOTIATE_UNICODE               (1<<0)
 /* Indicates that Unicode strings are supported for use in security buffer