(routing+lnrpc): arbitrary route source + route transformation#9153

calvinrzachman wants to merge 3 commits intolightningnetwork:elle-base-branch-payment-servicelightningnetwork/lnd:elle-base-branch-payment-servicefrom

calvinrzachman:route-manipulationcalvinrzachman/lnd:route-manipulationCopy head branch name to clipboard