determine steps to fix getDelayForName in 17.3; we still work around a bug there

The 17.4+ codebase had to work around a bug that exists in the previous versions. See https://github.com/lbryio/lbrycrd/blame/v17_master/src/claimtrie/trie.cpp#L921 . It would be nice if we could hard-fork this out in both 17.3 and 17.4+ (aka, v17_master and v19_master) in our next hard fork, but we need to identify the proper fix for it in the 17.3 codebase (aka, master).