to discourage its use by interactive users. Add documentation to
help tool writers.
+ * "git apply --3way" learned to take "--ours" and other options.
+
+
Performance, Internal Implementation, Development Support etc.
--------------------------------------------------------------
* Other code cleanup, docfix, build fix, etc.
(merge be10ac7037 jc/mailinfo-header-cleanup later to maint).
(merge 9a36ea37ae jc/doc-skip-fetch-all-and-prefetch later to maint).
+ (merge 4460e052e0 jc/range-diff-lazy-setup later to maint).