initialize GSlice config from G_SLICE environemtn variable. we support

initialize GSlice config from G_SLICE environemtn variable. we support

Mon Jan 23 16:46:20 2006  Tim Janik  <timj@imendio.com>

        * glib/gslice.c (slice_config_init): initialize GSlice config from
        G_SLICE environemtn variable. we support G_SLICE=always-malloc
        currently, which forces all g_slice_*() allocations to use the system
        malloc instead.

        * glib/gutils.c:
        g_parse_debug_string(): added a note about not using g_malloc() here.
        _g_getenv_nomalloc(): getenv() variant that doesn't use g_malloc or
        g_slice. contains only guesswork in the WIN32 branch.