add initial CMake and Visual Studio build support

This moves the compatibility include files from include to
include/compat so we can use the awful MS C compiler
<../include/> trick to emulate the GNU #include_next extension.

This also removes a few old compat files we do not need anymore.

tls/CMakeLists.txt

@@ -0,0 +1,22 @@
+include_directories(
+	.
+	../include
+	../include/compat
+)
+
+set(
+	TLS_SRC
+	tls.c
+	tls_client.c
+	tls_config.c
+	tls_server.c
+	tls_util.c
+	tls_verify.c
+)
+
+
+if(NOT HAVE_STRCASECMP)
+	set(TLS_SRC ${TLS_SRC} strsep.c)
+endif()
+
+add_library(tls ${TLS_SRC})

tls/Makefile.am

@@ -3,6 +3,7 @@ include $(top_srcdir)/Makefile.am.common
 lib_LTLIBRARIES = libtls.la
 
 EXTRA_DIST = VERSION
+EXTRA_DIST += CMakeLists.txt
 
 libtls_la_LDFLAGS = -version-info @LIBTLS_VERSION@ -no-undefined
 libtls_la_LIBADD = ../crypto/libcrypto.la ../ssl/libssl.la $(PLATFORM_LDADD)