Merge #820: [0.18 backport] Include deque to fix build

f790f85 Include deque to fix build (Steven Roose)

Pull request description:

  Backport of #819

Tree-SHA512: ca1b0b03ff9c611f632ca9a8c10dde82a942bbee3081dc27e0d782638fac33b5dc8d020b7563717cf69bbaba0d2589873e526ce17d30f19e59706764e6503de0

src/httpserver.cpp

@@ -14,6 +14,7 @@
 #include <sync.h>
 #include <ui_interface.h>
 
+#include <deque>
 #include <memory>
 #include <stdio.h>
 #include <stdlib.h>