update readme

README.md

@@ -45,7 +45,7 @@ php src/server.php type=nex host=127.0.0.1 port=1900 root=/target/dir
 
 ##### Required
 
-* `type` - server protocol, usually auto-define default `port`, available protocols:
+* `type` - server protocol, also auto-defines default `port`, supported options:
   * `nex` - [NEX Protocol](https://nightfall.city/nex/info/specification.txt)
 * `root` - **absolute path** to the public directory, where browser navigation starting from
 
@@ -55,7 +55,7 @@ php src/server.php type=nex host=127.0.0.1 port=1900 root=/target/dir
 * `port` - default value depends of server `type` selected, for example `1900` for `nex` or `1965` for `gemini`
 * `file` - index **file name** that server try to open on directory path requested, disabled by default
 * `list` - show content listing in the requested directory (when index `file` not found), enabled by default
-* `time` - show file modification time as the alt text in directory listing, disabled by default
+* `time` - show file modification time as the alt text in directory listing (useful for gemfeed), disabled by default
 * `fail` - **absolute path** to the failure template (e.g. `/path/to/error.gmi`), disabled by default
 * `dump` - `enable` or `disable` query log, `enable` by default