[knot-dns-users] Documentation nits

Hello, I'd like to mention a few nits about Knot's documentation, if you don't mind. :) 1. Docs linked to from https://www.knot-dns.cz/documentation.html have URLs which don't look permanent; this makes it difficult to link to individual pages. It would be better imo, to have permanent URIs. 2. The usage message for [knotc flush] says "Flush journal and update zone files.". I understand this to mean zones that have received updates (RFC2136) will be written out, but this doesn't occur. I note zones are written out only at the end of a `zonefile-sync' period. 3. ixfr-from-differences, while documented in the manual, points to 'Controlling running daemon', but it doesn't say there, that the syntax is 'on/off'. Enabling this in zones {} doesn't seem to do anything here: I was expecting to see a "*.ixfr" or some such file containing diffs, but I get none; neither for incoming xfr, nor for DNS updates. 4. Docs specify in 'Controlling running daemon' there is a knotc option -a, but the code doesn't have that: knotc: invalid option -- 'a' Same for 'Running Knot DNS' chapter. Regards, -JP