ec6902d0e rpc: Push down safe mode checks (Andrew Chow)
Pull request description:
This contains most of the changes of #10563 "remove safe mode" by @achow101, but doesn't remove the safe mode yet, but put an `ObserveSafeMode()` check in (all 23) individual calls which used to have okSafeMode=false.
This cleans up the ugly "okSafeMode" flag from the dispatch tables, which is not a concern for the RPC server.
Extra-author: Wladimir J. van der Laan <laanwj@gmail.com>
Tree-SHA512: eee0f251fe2f38f122e7391e3c4e98d6a1e2757f3b718d6b560ad835ae94f11490865a0aef893e90b5fe298165932c8dd8298224173ac2677a5245cd532bac6e