[gobject-introspection] configure: Comment why doctool is disabled by default for now

[Colin Walters <walters src gnome org>]

commit b4afe8437f78a0259a3eb6f4c9af963acbed5b8a
Author: Colin Walters <walters verbum org>
Date:   Thu Mar 15 11:45:19 2012 -0400

    configure: Comment why doctool is disabled by default for now

 configure.ac |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6c65eac..cd211a5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -272,6 +272,8 @@ if test "x$os_win32" = "xyes"; then
   AM_CHECK_PYTHON_LIBS(, AC_MSG_ERROR([Python libs not found. Windows requires Python modules to be explicitly linked to libpython.]))
 fi
 
+dnl Not enabled by default until 3.6 cycle when we can propose mako as
+dnl an external dependency
 AC_ARG_ENABLE(doctool,[  --enable-doctool           enable g-ir-doctool ], enable_doctool=$enableval,enable_doctool=no)
 if test x$enable_doctool != xno; then
    AM_CHECK_PYMOD(mako,,,[AC_MSG_ERROR(Could not find python module: mako)])