+.option debug_store main boolean &`false`&
+.cindex debugging "memory corruption"
+.cindex memory debugging
+This option, when true, enables extra checking in Exim's internal memory
+management. For use when a memory corruption issue is being investigated,
+it should normally be left as default.
+
+.new
+.option lazy_init main "string list" unset
+.cindex startup "deferred initialization"
+This option controls which features perform a lazy initialization,
+deferred until the feature is used. If the string list is unset (the
+default), no deferred initialization happens. The option may be set to
+exactly "*", which causes deferral all possible initializations, or it
+may be set to a list of strings of the set "tls", "dkim". This is an
+advanced option. Deferring initialization may make Exim harder to to
+debug. This option is experimental and may be removed or renamed without
+further notice.
+.wen
+