ch-03: mention new 26-ish hop limit post TLV

03_how_ln_works.asciidoc

@@ -564,7 +564,7 @@ The onion routing protocol used in Lightning has the following properties:
 
 . Onions have an HMAC (Hashed Message Authentication code) at each layer so that manipulations of onions are prevented and practically impossible.
 
-. Onions can have up to 20 hops or onion layers if you prefer. This allows for sufficiently long paths.
+. Onions can have up to around 26 hops or onion layers if you prefer. This allows for sufficiently long paths. The precise path length avaiblael dpeneds on the amount of bytes allocated to teh routing payload at each hop.
 
 . The encryption of the onion for every hop uses different ephemeral encryption keys. Should a key (in particular the private key of a node) leak at some point in time an attacker cannot decrypt them. In simpler terms, keys are never reused in order to achieve more security.