A followup to #2099, #2100 and #2127. Now relative links to js/css
resources will use the same hostname etc. the main page was requested
from, making them work better when accessed via multiple IP
addresses/hostnames without an explicit --base-url setting.
A simple web-based user interface for the hledger accounting system,
providing a more modern UI than the command-line or terminal interfaces.
It can be used as a local single-user UI, or as a multi-user UI for
viewing/adding/editing on the web.
fa8d223858