docs: any path can be absolute or relative (#4035)

Fixes #4026

config/toml.go

@@ -67,6 +67,11 @@ func WriteConfigFile(configFilePath string, config *Config) {
 const defaultConfigTemplate = `# This is a TOML config file.
 # For more information, see https://github.com/toml-lang/toml
 
+# NOTE: Any path below can be absolute (e.g. "/var/myawesomeapp/data") or
+# relative to the home directory (e.g. "data"). The home directory is
+# "$HOME/.tendermint" by default, but could be changed via $TMHOME env variable
+# or --home cmd flag.
+
 ##### main base config options #####
 
 # TCP or UNIX socket address of the ABCI application,