Update list-strategies command

closes #6795

docs/utils.md

@@ -119,6 +119,7 @@ This subcommand is useful for finding problems in your environment with loading
 usage: freqtrade list-strategies [-h] [-v] [--logfile FILE] [-V] [-c PATH]
                                  [-d PATH] [--userdir PATH]
                                  [--strategy-path PATH] [-1] [--no-color]
+                                 [--recursive-strategy-search]
 
 optional arguments:
   -h, --help            show this help message and exit
@@ -126,6 +127,9 @@ optional arguments:
   -1, --one-column      Print output in one column.
   --no-color            Disable colorization of hyperopt results. May be
                         useful if you are redirecting output to a file.
+  --recursive-strategy-search
+                        Recursively search for a strategy in the strategies
+                        folder.
 
 Common arguments:
   -v, --verbose         Verbose mode (-vv for more, -vvv to get all messages).
@@ -134,9 +138,10 @@ Common arguments:
                         details.
   -V, --version         show program's version number and exit
   -c PATH, --config PATH
-                        Specify configuration file (default: `config.json`).
-                        Multiple --config options may be used. Can be set to
-                        `-` to read config from stdin.
+                        Specify configuration file (default:
+                        `userdir/config.json` or `config.json` whichever
+                        exists). Multiple --config options may be used. Can be
+                        set to `-` to read config from stdin.
   -d PATH, --datadir PATH
                         Path to directory with historical backtesting data.
   --userdir PATH, --user-data-dir PATH