Made the following changes:

- Use host name specified in ObtainAuthToken call instead of the
    normalized host name to connect to the ATS to avoid problems
    when the host name obtained through a reverse DNS lookup fails
    to resolve via a forward DNS lookup.

  - Added the capability log debug messages to a file.

  - Added method to the ConfigIf to free memory returned by calls to
    getEntryValue to avoid issues related to freeing memory allocated
    with a heap different than the one owned by the library freeing
    the memory.

CASA-auth-token/client/library/mechanisms/krb5/interface.c

@@ -128,12 +128,20 @@ AuthTokenIf_ReleaseReference(
 CasaStatus SSCS_CALL
 GET_AUTH_TOKEN_INTERFACE_RTN(
    IN       const ConfigIf    *pModuleConfigIf,
+   IN       const int         debugLevel,
+   IN       const char        *pDebugFilePath,
    INOUT    AuthTokenIf       **ppAuthTokenIf)
 //
 // Arguments:  
 //    pModuleConfigIf -
 //       Pointer to configuration interface instance for the module.
 //               
+//    debugLevel -
+//       Level to utilize for debugging, 0 being lowest.
+//
+//    pDebugFilePath -
+//       Path to debug log file. Can be NULL.
+//               
 //    ppAuthTokenIf -
 //       Pointer to variable that will receive pointer to AuthTokenIf
 //       instance.
@@ -150,6 +158,7 @@ GET_AUTH_TOKEN_INTERFACE_RTN(
    CasaStatus           retStatus;
    AuthTokenIfInstance  *pAuthTokenIfInstance;
    char                 *pDebugLevelSetting;
+   char                 *pDebugLogFolderPathSetting;
 
    DbgTrace(1, "-GetAuthTokenInterface- Start\n", 0);
 
@@ -165,17 +174,20 @@ GET_AUTH_TOKEN_INTERFACE_RTN(
       goto exit;
    }
 
-   // Check if a DebugLevel has been configured
-   pDebugLevelSetting = pModuleConfigIf->getEntryValue(pModuleConfigIf, "DebugLevel");
-   if (pDebugLevelSetting != NULL)
+   // Save debug parameters
+   KrbMechDebugLevel = debugLevel;
+   if (pDebugFilePath)
    {
-      DbgTrace(0, "-GetAuthTokenInterface- DebugLevel configured = %s\n", pDebugLevelSetting);
-      
-      // Convert the number to hex
-      DebugLevel = (int) dtoul(pDebugLevelSetting, strlen(pDebugLevelSetting));
-
-      // Free the buffer holding the debug level
-      free(pDebugLevelSetting);
+      // Use the setting to come up with the path to the debug log file
+      pKrbMechDebugLogFilePath = malloc(strlen(pDebugFilePath) + 1);
+      if (pKrbMechDebugLogFilePath)
+      {
+         strcpy(pKrbMechDebugLogFilePath, pDebugFilePath);
+      }
+      else
+      {
+         DbgTrace(0, "-GetAuthTokenInterface- Failed to allocate buffer for debug file path\n", 0);
+      }
    }
 
    // Allocate space for the interface instance