The ADMINISTRATORS list contained hardcoded post IDs (in the 30000s)
intended to be used for uploading graphical assets onto a production
instance of the site. This functionality is not needed here, and the
special logic to bypass awards when commenting on those posts was
largely removed in 9d4195a89f.
Borrows code from the upstream which has been working in production
reliably for ~months. Also, most of it was literally copy-pasted,
and the casted ID values aren't used later in the route functions.
Rather than generating the URL in helpers/jinja2.py, we move the logic
to helpers/assetcache.py because there are consumers of asset URLs
in Python code (for better or for worse).
Provides a module `assetcache` to support automatic cachebusting of
static web assets, rather than the current approach of incrementing
a version number.
On module load, it walks the file/assets/ dir, computes a CRC32 of
each asset, and provides those hashes via `assetcache_get(path)` at
runtime. The primary consumer of hashes at present is the new `asset`
filter for Jinja2, which accepts a relative asset path and returns the
full path, with cache busting, suitable for final use in the template.
Ex: `{{ 'css/main.css' | asset }}`
