doc+triggerforceclose: make command help more explicit

cmd/chantools/triggerforceclose.go

@@ -38,8 +38,13 @@ func newTriggerForceCloseCommand() *cobra.Command {
 	cc := &triggerForceCloseCommand{}
 	cc.cmd = &cobra.Command{
 		Use: "triggerforceclose",
-		Short: "Connect to a peer and send a custom message to " +
+		Short: "Connect to a CLN peer and send a custom message to " +
 			"trigger a force close of the specified channel",
+		Long: `Certain versions of CLN didn't properly react to error
+messages sent by peers and therefore didn't follow the DLP protocol to recover
+channel funds using SCB. This command can be used to trigger a force close with
+those earlier versions of CLN (this command will not work for lnd peers or CLN
+peers of a different version).`,
 		Example: `chantools triggerforceclose \
 	--peer 03abce...@xx.yy.zz.aa:9735 \
 	--channel_point abcdef01234...:x`,

doc/chantools.md

@@ -44,7 +44,7 @@ Complete documentation is available at https://github.com/lightninglabs/chantool
 * [chantools sweepremoteclosed](chantools_sweepremoteclosed.md)	 - Go through all the addresses that could have funds of channels that were force-closed by the remote party. A public block explorer is queried for each address and if any balance is found, all funds are swept to a given address
 * [chantools sweeptimelock](chantools_sweeptimelock.md)	 - Sweep the force-closed state after the time lock has expired
 * [chantools sweeptimelockmanual](chantools_sweeptimelockmanual.md)	 - Sweep the force-closed state of a single channel manually if only a channel backup file is available
-* [chantools triggerforceclose](chantools_triggerforceclose.md)	 - Connect to a peer and send a custom message to trigger a force close of the specified channel
+* [chantools triggerforceclose](chantools_triggerforceclose.md)	 - Connect to a CLN peer and send a custom message to trigger a force close of the specified channel
 * [chantools vanitygen](chantools_vanitygen.md)	 - Generate a seed with a custom lnd node identity public key that starts with the given prefix
 * [chantools walletinfo](chantools_walletinfo.md)	 - Shows info about an lnd wallet.db file and optionally extracts the BIP32 HD root key
 * [chantools zombierecovery](chantools_zombierecovery.md)	 - Try rescuing funds stuck in channels with zombie nodes

doc/chantools_triggerforceclose.md

@@ -1,6 +1,14 @@
 ## chantools triggerforceclose
 
-Connect to a peer and send a custom message to trigger a force close of the specified channel
+Connect to a CLN peer and send a custom message to trigger a force close of the specified channel
+
+### Synopsis
+
+Certain versions of CLN didn't properly react to error
+messages sent by peers and therefore didn't follow the DLP protocol to recover
+channel funds using SCB. This command can be used to trigger a force close with
+those earlier versions of CLN (this command will not work for lnd peers or CLN
+peers of a different version).
 
 ```
 chantools triggerforceclose [flags]