scripted-diff: rename cs_mapLocalHost -> g_maplocalhost_mutex

-BEGIN VERIFY SCRIPT-
s() { sed -i 's/cs_mapLocalHost/g_maplocalhost_mutex/g' $1; }
s src/net.cpp
s src/net.h
s src/rpc/net.cpp
s src/test/net_tests.cpp
-END VERIFY SCRIPT-

src/test/net_tests.cpp

@@ -593,7 +593,7 @@ BOOST_AUTO_TEST_CASE(ipv4_peer_with_ipv6_addrMe_test)
     // that a normal IPv4 address is among the entries, but if this address is
     // !IsRoutable the undefined behavior is easier to trigger deterministically
     {
-        LOCK(cs_mapLocalHost);
+        LOCK(g_maplocalhost_mutex);
         in_addr ipv4AddrLocal;
         ipv4AddrLocal.s_addr = 0x0100007f;
         CNetAddr addr = CNetAddr(ipv4AddrLocal);