Install major version symlink of shared objects.

This change addresses the issue discussed in #1202 and should make it
possible in the future to update minor versions without requiring
re-linking binaries.

Makefile

@@ -311,7 +311,7 @@ install: $(DYLIBNAME) $(STLIBNAME) $(PKGCONFNAME) $(SSL_INSTALL)
 	$(INSTALL) hiredis.h async.h read.h sds.h alloc.h sockcompat.h $(INSTALL_INCLUDE_PATH)
 	$(INSTALL) adapters/*.h $(INSTALL_INCLUDE_PATH)/adapters
 	$(INSTALL) $(DYLIBNAME) $(INSTALL_LIBRARY_PATH)/$(DYLIB_MINOR_NAME)
-	cd $(INSTALL_LIBRARY_PATH) && ln -sf $(DYLIB_MINOR_NAME) $(DYLIBNAME)
+	cd $(INSTALL_LIBRARY_PATH) && ln -sf $(DYLIB_MINOR_NAME) $(DYLIBNAME) && ln -sf $(DYLIB_MINOR_NAME) $(DYLIB_MAJOR_NAME)
 	$(INSTALL) $(STLIBNAME) $(INSTALL_LIBRARY_PATH)
 	mkdir -p $(INSTALL_PKGCONF_PATH)
 	$(INSTALL) $(PKGCONFNAME) $(INSTALL_PKGCONF_PATH)
@@ -320,7 +320,7 @@ install-ssl: $(SSL_DYLIBNAME) $(SSL_STLIBNAME) $(SSL_PKGCONFNAME)
 	mkdir -p $(INSTALL_INCLUDE_PATH) $(INSTALL_LIBRARY_PATH)
 	$(INSTALL) hiredis_ssl.h $(INSTALL_INCLUDE_PATH)
 	$(INSTALL) $(SSL_DYLIBNAME) $(INSTALL_LIBRARY_PATH)/$(SSL_DYLIB_MINOR_NAME)
-	cd $(INSTALL_LIBRARY_PATH) && ln -sf $(SSL_DYLIB_MINOR_NAME) $(SSL_DYLIBNAME)
+	cd $(INSTALL_LIBRARY_PATH) && ln -sf $(SSL_DYLIB_MINOR_NAME) $(SSL_DYLIBNAME) && ln -sf $(SSL_DYLIB_MINOR_NAME) $(SSL_DYLIB_MAJOR_NAME)
 	$(INSTALL) $(SSL_STLIBNAME) $(INSTALL_LIBRARY_PATH)
 	mkdir -p $(INSTALL_PKGCONF_PATH)
 	$(INSTALL) $(SSL_PKGCONFNAME) $(INSTALL_PKGCONF_PATH)