Fix netinet/tcp.h header check to include prerequisite headers.

Index: cmake/ConfigureChecks.cmake
--- cmake/ConfigureChecks.cmake.orig
+++ cmake/ConfigureChecks.cmake
@@ -1,4 +1,5 @@
 include(CheckIncludeFile)
+include(CheckIncludeFiles)
 check_include_file("arpa/inet.h" HAVE_ARPA_INET_H)
 check_include_file("dlfcn.h" HAVE_DLFCN_H)
 check_include_file("gssapi/gssapi.h" HAVE_GSSAPI_GSSAPI_H)
@@ -6,7 +7,7 @@ check_include_file("inttypes.h" HAVE_INTTYPES_H)
 check_include_file("memory.h" HAVE_MEMORY_H)
 check_include_file("netdb.h" HAVE_NETDB_H)
 check_include_file("netinet/in.h" HAVE_NETINET_IN_H)
-check_include_file("netinet/tcp.h" HAVE_NETINET_TCP_H)
+check_include_files("sys/types.h;netinet/tcp.h" HAVE_NETINET_TCP_H)
 check_include_file("net/if.h" HAVE_NET_IF_H)
 check_include_file("poll.h" HAVE_POLL_H)
 check_include_file("stdint.h" HAVE_STDINT_H)