At this point there is no reasonable excuse to disable opt-in RBF,
and, unlike when this option was added, there are now significant
issues created when disabling it (in the form of compact block
reconstruction failures). Further, it breaks a lot of modern wallet
behavior.
Master was bumped to 0.16.99, so update the man pages too to avoid
confusion.
Tree-SHA512: 63622d6ebea2fb052ffe05fb80fe08bd627c34310a7ca22b2bc1af74003b20ab1a1fde51746ee69d401379d65232981b68541a9fc7f329e04b854507f836b19e
