kernel: Add more backtrace levels

Author: fwsGonzo

src/kernel/elf.cpp

@@ -285,7 +285,17 @@ void print_backtrace()
                     PRINT_TRACE(8, ra);
                     if (frp(9, ra)) {
                       PRINT_TRACE(9, ra);
-  }}}}}}}}}}
+                      if (frp(10, ra)) {
+                        PRINT_TRACE(10, ra);
+                        if (frp(11, ra)) {
+                          PRINT_TRACE(11, ra);
+                          if (frp(12, ra)) {
+                            PRINT_TRACE(12, ra);
+                            if (frp(13, ra)) {
+                              PRINT_TRACE(13, ra);
+                              if (frp(14, ra)) {
+                                PRINT_TRACE(14, ra);
+  }}}}}}}}}}}}}}}
 }
 
 void Elf::print_info()

src/net/tcp/connection.cpp

@@ -269,10 +269,10 @@ void Connection::close() {
 
 void Connection::receive_disconnect() {
   Expects(read_request and read_request->buffer.buffer());
-  auto& buf = read_request->buffer;
 
   if(read_request->callback) {
     // TODO: consider adding back when SACK is complete
+    //auto& buf = read_request->buffer;
     //if (buf.size() > 0 && buf.missing() == 0)
     //    read_request->callback(buf.buffer(), buf.size());
   }