Merge Phil Zimmermann's libzrtp as a FreeSWITCH library

Thanks to Phil Zimmermann for the code and for the license exception
we needed to include it.

There remains some build system integration work to be done before
this code will build properly in the FreeSWITCH tree.

libs/libzrtp/projects/gnu/build/test/Makefile.am

@@ -0,0 +1,57 @@
+
+# Copyright (c) 2006-2009 Philip R. Zimmermann. All rights reserved.
+# Contact: http://philzimmermann.com
+# 
+# Viktor Krikun <v.krikun@soft-industry.com> <v.krikun@gmail.com>
+#
+
+
+
+TOP_SRCDIR=$(top_srcdir)/../..
+INCLUDES = 	-I$(TOP_SRCDIR)/include \
+			-I$(TOP_SRCDIR)/include/enterprise \
+			-I$(TOP_SRCDIR)/. \
+			-I$(TOP_SRCDIR)/test \
+			-I$(TOP_SRCDIR)/test/cmockery \
+			-I$(TOP_SRCDIR)/third_party/bgaes \
+			-I$(TOP_SRCDIR)/third_party/bnlib
+
+
+#check_PROGRAMS = cache_test libzrtp_test
+check_PROGRAMS = cache_test
+
+### ZRTP Cache testing
+
+cache_test_SOURCES = $(TOP_SRCDIR)/test/cmockery/cmockery.c \
+					 $(TOP_SRCDIR)/test/cache_test.c
+cache_test_LDADD   = ../libzrtp.a  $(TOP_SRCDIR)/third_party/bnlib/libbn.a -lpthread
+
+
+### ZRTP high-level test-case 
+
+libzrtp_test_SOURCES =	$(TOP_SRCDIR)/test/pc/zrtp_test_core.c \
+					  	$(TOP_SRCDIR)/test/pc/zrtp_test_crypto.c \
+						$(TOP_SRCDIR)/test/pc/zrtp_test_queue.c \
+						$(TOP_SRCDIR)/test/pc/zrtp_test_ui.c
+
+libzrtp_test_LDADD = ../libzrtp.a $(TOP_SRCDIR)/third_party/bnlib/libbn.a -lpthread
+
+SUBDIRS = .
+
+check:	
+#	@ ./cache_test
+
+# check:
+# 	@echo ""
+# 	@echo "*========================================================================*"
+# 	@echo "*    starting libZRTP tests                                              *"
+# 	@echo "*========================================================================*"
+# 	@echo ""
+# 	@./libzrtp_test
+# 
+# 	@echo ""
+# 	@echo "*========================================================================*"
+# 	@echo "* In case you have a test FAILED send the generated log file       *"
+# 	@echo "* with your comment to <zrtp_support@zfoneproject.com>.            *" 
+# 	@echo "*========================================================================*"
+# 	@echo ""