scripted-diff: Replace boost::bind with std::bind

-BEGIN VERIFY SCRIPT-
for j in $(seq 1 5)
do
    sed -i "s/ _${j}/ std::placeholders::_${j}/g" $(git grep --name-only " _${j}" -- '*.cpp' '*.h')
done
sed -i "s/boost::bind/std::bind/g" $(git grep --name-only boost::bind -- '*.cpp' '*.h')
sed -i "s/boost::ref/std::ref/g" $(git grep --name-only boost::ref -- '*.cpp' '*.h')
sed -i '/boost\/bind/d' $(git grep --name-only boost/bind)
-END VERIFY SCRIPT-

src/rpc/server.cpp

@@ -14,7 +14,6 @@
 #include <util.h>
 #include <utilstrencodings.h>
 
-#include <boost/bind.hpp>
 #include <boost/signals2/signal.hpp>
 #include <boost/algorithm/string/classification.hpp>
 #include <boost/algorithm/string/split.hpp>