Boost library min/max guidance:

fix #170

test/core/clamp.cpp

@@ -20,8 +20,8 @@ public:
     void testClamp()
     {
         BEAST_EXPECT(clamp(
-            std::numeric_limits<std::uint64_t>::max()) ==
-                std::numeric_limits<std::size_t>::max());
+            (std::numeric_limits<std::uint64_t>::max)()) ==
+                (std::numeric_limits<std::size_t>::max)());
     }
 
     void run() override

test/http/message_fuzz.hpp

@@ -514,7 +514,7 @@ public:
             write(db, "Transfer-Encoding: chunked\r\n\r\n");
             while(len > 0)
             {
-                auto n = std::min(1 + rand(300), len);
+                auto n = (std::min)(1 + rand(300), len);
                 len -= n;
                 write(db, to_hex(n), "\r\n");
                 for(auto const& b : db.prepare(n))

test/websocket/utf8_checker.cpp

@@ -289,7 +289,7 @@ public:
                 streambuf sb(size);
                 while(n)
                 {
-                    auto const amount = std::min(n, size);
+                    auto const amount = (std::min)(n, size);
                     sb.commit(buffer_copy(sb.prepare(amount), cb));
                     cb.consume(amount);
                     n -= amount;