Tidy up test sources:

Test support classes are moved to beast/extras/test.

examples/CMakeLists.txt

@@ -1,8 +1,9 @@
 # Part of Beast
 
-GroupSources(include/beast)
-GroupSources(examples)
-GroupSources(test)
+GroupSources(extras/beast beast)
+GroupSources(include/beast beast)
+
+GroupSources(examples "/")
 
 add_executable (http-crawl
     ${BEAST_INCLUDES}
@@ -22,7 +23,6 @@ add_executable (http-server
     http_stream.hpp
     http_stream.ipp
     http_sync_server.hpp
-    ../test/sig_wait.hpp
     http_server.cpp
 )
 

examples/http_server.cpp

@@ -19,8 +19,8 @@
 
 #include "http_async_server.hpp"
 #include "http_sync_server.hpp"
-#include "../test/sig_wait.hpp"
 
+#include <beast/test/sig_wait.hpp>
 #include <boost/program_options.hpp>
 
 #include <iostream>
@@ -72,5 +72,5 @@ int main(int ac, char const* av[])
         http_sync_server server(ep, root);
     else
         http_async_server server(ep, threads, root);
-    sig_wait();
+    beast::test::sig_wait();
 }