Fix compatibility with nginx 1.20.x.

See-Also: https://github.com/nginx/njs/issues/18

--- a/nginx/config.make
+++ b/nginx/config.make
@@ -3,7 +3,7 @@
 $ngx_addon_dir/../build/libnjs.a: $NGX_MAKEFILE
 	cd $ngx_addon_dir/.. \\
 	&& if [ -f build/Makefile ]; then \$(MAKE) clean; fi \\
-	&& CFLAGS="\$(CFLAGS)" CC="\$(CC)" ./configure --no-openssl --no-libxml2 --no-zlib --no-pcre \\
+	&& CFLAGS="\$(CFLAGS)" CC="\$(CC)" ./configure \\
 	&& \$(MAKE) libnjs
 
 END