define dl_method
$(strip \
$(if $(2),$(2), \
- $(if $(filter @GNOME/% @GNU/% @KERNEL/% @SF/% ftp://% http://% file://%,$(1)),default, \
+ $(if $(filter @GNOME/% @GNU/% @KERNEL/% @SF/% ftp://% http://% https://% file://%,$(1)),default, \
$(if $(filter git://%,$(1)),git, \
$(if $(filter svn://%,$(1)),svn, \
$(if $(filter cvs://%,$(1)),cvs, \