fixing #7772 exactly as suggested by reporter

src/microhttpd/connection.c

@@ -1935,7 +1935,6 @@ connection_maximize_write_buffer (struct MHD_Connection *connection)
 }
 
 
-#if 0 /* disable unused function */
 /**
  * Shrink connection write buffer to the size of unsent data.
  *
@@ -1955,7 +1954,8 @@ connection_shrink_write_buffer (struct MHD_Connection *connection)
   mhd_assert (c->write_buffer_append_offset >= c->write_buffer_send_offset);
   mhd_assert (c->write_buffer_size >= c->write_buffer_append_offset);
 
-  if ( (NULL == c->write_buffer) || (0 == c->write_buffer_size))
+  if ( (NULL == c->write_buffer) ||
+       (0 == c->write_buffer_size) )
   {
     mhd_assert (0 == c->write_buffer_append_offset);
     mhd_assert (0 == c->write_buffer_send_offset);
@@ -1965,7 +1965,9 @@ connection_shrink_write_buffer (struct MHD_Connection *connection)
   if (c->write_buffer_append_offset == c->write_buffer_size)
     return;
 
-  new_buf = MHD_pool_reallocate (pool, c->write_buffer, c->write_buffer_size,
+  new_buf = MHD_pool_reallocate (pool,
+                                 c->write_buffer,
+                                 c->write_buffer_size,
                                  c->write_buffer_append_offset);
   mhd_assert ((c->write_buffer == new_buf) || \
               (0 == c->write_buffer_append_offset));
@@ -1977,9 +1979,6 @@ connection_shrink_write_buffer (struct MHD_Connection *connection)
 }
 
 
-#endif /* unused function */
-
-
 /**
  * Switch connection from recv mode to send mode.
  *
@@ -6626,6 +6625,9 @@ MHD_connection_handle_idle (struct MHD_Connection *connection)
 #ifdef UPGRADE_SUPPORT
       if (NULL != connection->rp.response->upgrade_handler)
       {
+        /* We may start to read again after the header,
+           so shrink the write buffer again */
+        connection_shrink_write_buffer (connection);
         connection->state = MHD_CONNECTION_UPGRADE;
         /* This connection is "upgraded".  Pass socket to application. */
         if (MHD_NO ==

src/microhttpd/digestauth.c

@@ -1459,7 +1459,7 @@ MHD_digest_auth_get_username (struct MHD_Connection *connection)
  * The current format of the nonce is ...
  * H(timestamp:random data:various parameters) + Hex(timestamp)
  *
- * @param nonce_time The amount of time in seconds for a nonce to be invalid
+ * @param nonce_time The amount of time in seconds for a nonce to be valid
  * @param mthd_e HTTP method as enum value
  * @param method HTTP method as a string
  * @param rnd the pointer to a character array for the random seed
@@ -1786,7 +1786,11 @@ calculate_add_nonce_with_retry (struct MHD_Connection *const connection,
                  "are predictable.\n"));
 #endif
 
-  if (! calculate_add_nonce (connection, timestamp1, realm, realm_len, da,
+  if (! calculate_add_nonce (connection,
+                             timestamp1,
+                             realm,
+                             realm_len,
+                             da,
                              nonce))
   {
     /* Either: