Fix compilation without gnutls

* imap4d/imap4d.c [WITH_TLS] (cb_tls_required): Conditional compilation.
* imap4d/imap4d.h [!WITH_TLS] (tls_encryption_on): Empty define.
* pop3d/pop3d.c [!WITH_TLS] (tls_available): Empty define.
* libmu_scm/mu_mailbox.c (mu_scm_mailbox_print): Fix format string.

@@ -284,6 +284,7 @@ cb_tls (void *data, mu_config_value_t *val)
 }
 #endif
 
+#ifdef WITH_TLS
 static int
 cb_tls_required (void *data, mu_config_value_t *val)
 {
@@ -307,6 +308,7 @@ cb_tls_required (void *data, mu_config_value_t *val)
     
   return 0;
 }
+#endif
 
 static mu_list_t auth_deny_user_list, auth_allow_user_list;
 static mu_list_t auth_deny_group_list, auth_allow_group_list;

@@ -339,6 +339,8 @@ extern int  imap4d_starttls (struct imap4d_session *,
 			     struct imap4d_command *, imap4d_tokbuf_t);
 extern void starttls_init (void);
 void tls_encryption_on (struct imap4d_session *);
+#else
+# define tls_encryption_on(s)
 #endif /* WITH_TLS */
 extern int  imap4d_status (struct imap4d_session *,
 			   struct imap4d_command *, imap4d_tokbuf_t);

@@ -95,7 +95,7 @@ biff_notify (mu_observer_t obs, size_t type, void *data, void *action_data)
 	{
 	  sendto (fd, buf, strlen (buf), 0,
 		  mbox->notify_sa, sizeof (struct sockaddr_in));
-	  //FIXME: on error?
+	  /*FIXME: on error?*/
 	  free (buf);
 	}
     }
@@ -110,8 +110,6 @@ mu_mailbox_set_notify (mu_mailbox_t mbox, const char *user)
 
   if (!mbox)
     return EINVAL;
-  //  if (!(mbox->flags & MU_STREAM_APPEND))
-  //    return EACCES;
 
   if (user)
     user = strdup (user);

@@ -81,7 +81,7 @@ mu_scm_mailbox_print (SCM mailbox_smob, SCM port, scm_print_state * pstate)
 	  
 	  scm_puts (p, port);
 	  
-	  snprintf (buf, sizeof (buf), " (%d)", count);
+	  snprintf (buf, sizeof (buf), " (%lu)", (unsigned long) count);
 	  scm_puts (buf, port);
 	}
       else

@@ -131,7 +131,7 @@ mu_smtp_auth (mu_smtp_t smtp)
 #else
   /* FIXME: Provide support for some basic authentication methods.
      Once done, make sure _mu_smtp_fixup_params is called for this
-     branc as well (though see the fixme above). */
+     branch as well (though see the fixme above). */
   return ENOSYS;
 #endif
 }

@@ -42,6 +42,8 @@ enum tls_mode tls_mode;
 #ifdef WITH_TLS
 int tls_available;
 int tls_done;
+#else
+# define tls_available 0
 #endif /* WITH_TLS */
 
 int initial_state = AUTHORIZATION; 
@@ -172,7 +174,6 @@ cb_tls (void *data, mu_config_value_t *val)
     mu_error (_("not a valid tls keyword: %s"), val->v.string);
   return 0;
 }
-#endif
 
 static int
 cb_tls_required (void *data, mu_config_value_t *val)
@@ -197,6 +198,7 @@ cb_tls_required (void *data, mu_config_value_t *val)
 
   return 0;
 }
+#endif
 
 static struct mu_cfg_param pop3d_srv_param[] = {
 #ifdef WITH_TLS