Merge bitcoin/bitcoin#23130: doc: Revert "Remove outdated comments" and place comment correctly

8ff3743 Revert "doc: Remove outdated comments" (Hennadii Stepanov)

Pull request description:

  Unfortunately, in #23094 the assumption that #14336 makes comments outdated is wrong. As pointed in  bitcoin/bitcoin#23094 (comment), the #14336 just moved the relevant code a few lines down.

  This PR reverts commit ee7891a, and moves the comments into the right place.

  I apologize about that.

ACKs for top commit:
  MarcoFalke:
    cr ACK 8ff3743
  laanwj:
    ACK 8ff3743

Tree-SHA512: 84aca627bb5b49c06fc172778f9b9407482c5a873ccbc3dc40167e6a8ad0bc60475d6a469c843b7b42712e35cf3fc2d3518923e791d5e0c59628e042acc72747

Author: laanwj

src/init.cpp

@@ -878,6 +878,8 @@ bool AppInitParameterInteraction(const ArgsManager& args)
 #else
     int fd_max = FD_SETSIZE;
 #endif
+    // Trim requested connection counts, to fit into system limitations
+    // <int> in std::min<int>(...) to work around FreeBSD compilation issue described in #2695
     nMaxConnections = std::max(std::min<int>(nMaxConnections, fd_max - nBind - MIN_CORE_FILEDESCRIPTORS - MAX_ADDNODE_CONNECTIONS - NUM_FDS_MESSAGE_CAPTURE), 0);
     if (nFD < MIN_CORE_FILEDESCRIPTORS)
         return InitError(_("Not enough file descriptors available."));