link against openssl for Mac OS X

Makefile.osx

@@ -1,9 +1,9 @@
 CXX = clang++
-CXXFLAGS = -g -Wall -std=c++11 -DCRYPTOPP_DISABLE_ASM -DMAC_OSX
-#CXXFLAGS = -g -O2 -Wall -std=c++11 -DCRYPTOPP_DISABLE_ASM
+CXXFLAGS = -g -Wall -std=c++11 -DMAC_OSX
+#CXXFLAGS = -g -O2 -Wall -std=c++11
 INCFLAGS = -I/usr/local/include
 LDFLAGS = -Wl,-rpath,/usr/local/lib -L/usr/local/lib
-LDLIBS = -lcryptopp -lboost_system -lboost_date_time -lboost_filesystem -lboost_regex -lboost_program_options -lpthread
+LDLIBS = -lz -lcrypto -lssl -lboost_system -lboost_date_time -lboost_filesystem -lboost_regex -lboost_program_options -lpthread
 
 ifeq ($(USE_UPNP),1)
   LDFLAGS += -ldl