Merge bitcoin/bitcoin#24360: doc: improve -netinfo help based on feedback from users and devs

a4da16fbd4 Improve -netinfo help based on feedback from users and devs (Jon Atack)

Pull request description:

  Clarify which networks are displayed by the peer counts table (*reachable* networks; follow-up to #23324) in response to questions received over the past months, and a few other improvements.

ACKs for top commit:
  laanwj:
    Code review ACK a4da16fbd4
  w0xlt:
    ACK a4da16f
  kristapsk:
    utACK a4da16fbd4

Tree-SHA512: e6522c08421aa7f10d50723156d0a8fc5ec82cad2f0bd931bbec603077fcd4921c6505ef743d57386fba81c95dcfc77df75abf3378319886368e4ae33f9a6d73

src/bitcoin-cli.cpp

@@ -606,8 +606,9 @@ public:
         "Suggestion: use with the Linux watch(1) command for a live dashboard; see example below.\n\n"
         "Arguments:\n"
         + strprintf("1. level (integer 0-%d, optional)  Specify the info level of the peers dashboard (default 0):\n", MAX_DETAIL_LEVEL) +
-        "                                  0 - Connection counts and local addresses\n"
-        "                                  1 - Like 0 but with a peers listing (without address or version columns)\n"
+        "                                  0 - Peer counts for each reachable network as well as for block relay peers\n"
+        "                                      and manual peers, and the list of local addresses and ports\n"
+        "                                  1 - Like 0 but preceded by a peers listing (without address and version columns)\n"
         "                                  2 - Like 1 but with an address column\n"
         "                                  3 - Like 1 but with a version column\n"
         "                                  4 - Like 1 but with both address and version columns\n"
@@ -645,13 +646,13 @@ public:
         "  id       Peer index, in increasing order of peer connections since node startup\n"
         "  address  IP address and port of the peer\n"
         "  version  Peer version and subversion concatenated, e.g. \"70016/Satoshi:21.0.0/\"\n\n"
-        "* The connection counts table displays the number of peers by direction, network, and the totals\n"
-        "  for each, as well as two special outbound columns for block relay peers and manual peers.\n\n"
+        "* The peer counts table displays the number of peers for each reachable network as well as\n"
+        "  the number of block relay peers and manual peers.\n\n"
         "* The local addresses table lists each local address broadcast by the node, the port, and the score.\n\n"
         "Examples:\n\n"
-        "Connection counts and local addresses only\n"
+        "Peer counts table of reachable networks and list of local addresses\n"
         "> bitcoin-cli -netinfo\n\n"
-        "Compact peers listing\n"
+        "The same, preceded by a peers listing without address and version columns\n"
         "> bitcoin-cli -netinfo 1\n\n"
         "Full dashboard\n"
         + strprintf("> bitcoin-cli -netinfo %d\n\n", MAX_DETAIL_LEVEL) +