put_delete_auth_file -> dav_auth_file

docs/Options.md

@@ -14,7 +14,7 @@ Extra environment variables to be passed to the CGI script in
 addition to standard ones. The list must be comma-separated list
 of name=value pairs, like this: `VARIABLE1=VALUE1,VARIABLE2=VALUE2`.
 
-### put\_delete\_auth\_file
+### dav\_auth\_file
 Passwords file for PUT and DELETE requests. Without it, PUT and DELETE requests
 will fail. The format of the passwords file is the same as for `.htpasswd` file
 used for Digest authentication. It can be created and managed by means