Tidy up HTTP reason_string (API Change):

fix #182

reason_string() is now located in <beast/http/message.hpp>
and returns a string view rather than char const*.

test/Jamfile

@@ -57,7 +57,6 @@ unit-test http-tests :
     http/message.cpp
     http/message_parser.cpp
     http/read.cpp
-    http/reason.cpp
     http/rfc7230.cpp
     http/string_body.cpp
     http/write.cpp

test/http/CMakeLists.txt

@@ -20,7 +20,6 @@ add_executable (http-tests
     message.cpp
     message_parser.cpp
     read.cpp
-    reason.cpp
     rfc7230.cpp
     string_body.cpp
     write.cpp

test/http/message.cpp

@@ -296,6 +296,13 @@ public:
         }();
     }
 
+    void
+    testReasonString()
+    {
+        for(int i = 1; i <= 999; ++i)
+            BEAST_EXPECT(! reason_string(i).empty());
+    }
+
     void
     run() override
     {
@@ -305,6 +312,7 @@ public:
         testPrepare();
         testSwap();
         testSpecialMembers();
+        testReasonString();
     }
 };
 

test/http/reason.cpp

@@ -1,29 +0,0 @@
-//
-// Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-// Test that header file is self-contained.
-#include <beast/http/reason.hpp>
-
-#include <beast/unit_test/suite.hpp>
-
-namespace beast {
-namespace http {
-
-class reason_test : public unit_test::suite
-{
-public:
-    void run() override
-    {
-        for(int i = 1; i <= 999; ++i)
-            BEAST_EXPECT(reason_string(i) != nullptr);
-    }
-};
-
-BEAST_DEFINE_TESTSUITE(reason,http,beast);
-
-} // http
-} // beast