Allow user-data-dir and extension-dir in config.yaml

Everything look good!



I am using the new option --config passing a file to code-server.

looks like user-data-dir and extensions-dir  is not read from file.

my config.yaml:

user-data-dir: /home/junyan/mnt/e/Config/code-server/Data/
extensions-dir: /home/junyan/mnt/e/Config/code-server/Extensions/


using command line parameter everything works.