Create autotools plumbing for SoftEther.

Add autoconf and automake capabilities to SoftEther so that it can be built
like this:

	# autoreconf --force --install
	# ./configure
	# make install DESTDIR=/tmp/softether

All standard configure parameters are supported, plus:

	# ./configure --enable-debug

Autotools support makes porting, cross compiling, and optimization much easier.

These GNU autoconf-archive components are used for dependency checking:

  * ax_check_openssl.m4
  * ax_check_zlib.m4
  * ax_lib_readline.m4
  * ax_pthread.m4
  * ax_with_curses.m4

NB: http://www.gnu.org/software/autoconf-archive/

src/vpnserver/Makefile.am

@@ -0,0 +1,29 @@
+#  Copyright 2014 Darik Horn <dajhorn@vanadac.com>
+#
+#  This file is part of SoftEther.
+#
+#  SoftEther is free software: you can redistribute it and/or modify it under
+#  the terms of the GNU General Public License as published by the Free 
+#  Software Foundation, either version 2 of the License, or (at your option)
+#  any later version.
+#
+#  SoftEther is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+#  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+#  details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  SoftEther.  If not, see <http://www.gnu.org/licenses/>.
+
+
+include $(top_srcdir)/autotools/softether.am
+
+sbin_PROGRAMS = \
+	vpnserver
+
+vpnserver_SOURCES = \
+	vpnserver.c
+
+vpnserver_LDADD = \
+	$(top_builddir)/src/Mayaqua/libmayaqua.la \
+	$(top_builddir)/src/Cedar/libcedar.la