This commit introduces the following, cosmetic changes:
- All callers of 'ldbGenericReplace' specify a non-nil 'deleteFn' argument.
Thus, remove the checks for 'deleteFn' being nil.
- Before this change, 'ldbInsert' took a 'FileInfo' argument and a
separate argument for the file name, but all callers passed in the
value of FileInfo.Name as the file name. Simplify this, by not not
passing in the file name as a separate argument. This makes the
function signature of 'ldbInsert' more similar to 'ldbUpdate'.
- doc fixes