File input (and others) shouldn't rely on $HOME

Using the $HOME variable can cause confusion when using the file input.

If a user is testing configuration files using their own login, $HOME would could be very different from INIT.

$HOME is also not typically defined in INIT scripts causing either the need for a work around (as seen in 1.4.x), or an ugly error.

Two options:
1. Either remove $HOME and the default setting and make the path a requirement.
2. Set the default path to something not relying on $HOME. IE: LSdirectory/sincedb