Updated File paths (markdown)

File-paths.md

@@ -15,6 +15,7 @@ Directory where the game executable (i.e. `pd.exe` or `pd`) is.
 
 #### Home directory (`$H`)
 Writable directory that's used for configs and saves in case the working directory and the executable directory are not writable.  
+On Linux it is assumed to be non-writable by default, unless there's a `pd.ini` file next to the executable.  
 On Windows: `%APPDATA%/perfectdark`  
 On Linux: `~/.local/share/perfectdark`