OK, pushed something, but didn't merge it to default yet -- since this changes
sensitive parts of the code, I want to run a test first. (You can get a preview
by looking at the issue301 branch.)
As discussed by email, there are some option changes:
- The initialize_by_h option is now gone, since the "false" value didn't work
properly and it making it work properly seems to have a poor cost/benefit
ratio. We always initialize by h *and* goal status now.
- For the "at_limit" option, only the two "simple" values "return" and "use_up"
are left. The others behaved very similarly to "return" but had vastly higher
code complexity. (See issue271.) The new default value is "return".
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