sasl: Updated SPN variables and comments for consistency

In places the "host name" and "realm" variable was referred to as
"instance" whilst in others it was referred to as "host".

lib/curl_sasl.c

@@ -263,19 +263,19 @@ static CURLcode sasl_digest_get_qop_values(const char *options, int *value)
 /*
  * Curl_sasl_build_spn()
  *
- * This is used to build a SPN string in the format service/host.
+ * This is used to build a SPN string in the format service/instance.
  *
  * Parameters:
  *
  * service  [in] - The service type such as www, smtp, pop or imap.
- * host     [in] - The host name or realm.
+ * instance [in] - The host name or realm.
  *
  * Returns a pointer to the newly allocated SPN.
  */
-char *Curl_sasl_build_spn(const char *service, const char *host)
+char *Curl_sasl_build_spn(const char *service, const char *instance)
 {
   /* Generate and return our SPN */
-  return aprintf("%s/%s", service, host);
+  return aprintf("%s/%s", service, instance);
 }
 #endif
 

lib/curl_sasl.h

@@ -146,7 +146,7 @@ int Curl_sasl_digest_get_pair(const char *str, char *value, char *content,
                               const char **endptr);
 
 #if defined(HAVE_GSSAPI)
-char *Curl_sasl_build_gssapi_spn(const char *service, const char *host);
+char *Curl_sasl_build_gssapi_spn(const char *service, const char *instance);
 #endif
 
 #ifndef CURL_DISABLE_CRYPTO_AUTH

lib/curl_sasl_gssapi.c

@@ -43,19 +43,19 @@
 /*
 * Curl_sasl_build_gssapi_spn()
 *
-* This is used to build a SPN string in the format service@host.
+* This is used to build a SPN string in the format service@instance.
 *
 * Parameters:
 *
-* serivce  [in] - The service type such as www, smtp, pop or imap.
-* host     [in] - The host name or realm.
+* service  [in] - The service type such as www, smtp, pop or imap.
+* instance [in] - The host name or realm.
 *
 * Returns a pointer to the newly allocated SPN.
 */
-char *Curl_sasl_build_gssapi_spn(const char *service, const char *host)
+char *Curl_sasl_build_gssapi_spn(const char *service, const char *instance)
 {
   /* Generate and return our SPN */
-  return aprintf("%s@%s", service, host);
+  return aprintf("%s@%s", service, instance);
 }
 
 /*

lib/curl_sasl_sspi.c

@@ -6,7 +6,7 @@
  *                             \___|\___/|_| \_\_____|
  *
  * Copyright (C) 2014 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
- * Copyright (C) 2014, Steve Holme, <steve_holme@hotmail.com>.
+ * Copyright (C) 2014 - 2015, Steve Holme, <steve_holme@hotmail.com>.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -49,16 +49,16 @@
 /*
  * Curl_sasl_build_spn()
  *
- * This is used to build a SPN string in the format service/host.
+ * This is used to build a SPN string in the format service/instance.
  *
  * Parameters:
  *
  * serivce  [in] - The service type such as www, smtp, pop or imap.
- * host     [in] - The host name or realm.
+ * instance [in] - The host name or realm.
  *
  * Returns a pointer to the newly allocated SPN.
  */
-TCHAR *Curl_sasl_build_spn(const char *service, const char *host)
+TCHAR *Curl_sasl_build_spn(const char *service, const char *instance)
 {
   char *utf8_spn = NULL;
   TCHAR *tchar_spn = NULL;
@@ -71,7 +71,7 @@ TCHAR *Curl_sasl_build_spn(const char *service, const char *host)
      formulate the SPN instead. */
 
   /* Allocate our UTF8 based SPN */
-  utf8_spn = aprintf("%s/%s", service, host);
+  utf8_spn = aprintf("%s/%s", service, instance);
   if(!utf8_spn) {
     return NULL;
   }