don't use 0.0 MiB, which can be confusing.

auto invalidate all cached blocks.

all blocks are fetched.

should use path relative to the Makefile, not project root.

failed to use ghc from store, it insists build from source. I gave up.

since I used setCurrentDirectory when serving static site,
combine webroot and user requested path will result in File Not
Found error. should always just use relative path or expand it to abs path.
I choose to expand abs path. This allow skip calculate sha1sum
when the same file is accessed via different webroot dir.

resolver: lts-20.26
this includes newer http-client which has the fix.

previously the regex capture didn't work when URL includes such string.
now I read path from http request directly, skip the regex capture.

- log msg is refined to print unicode string better on console.

tinylog is no longer in latest stackage lts.
RIO logging ts format is not customizable.
to make log using local timestamp, I need to switch to fast-logger.
I will defer this.

this allow rd-api to work on both ipv4 and ipv6 network by default.
when using 0.0.0.0, it won't work on ipv6 network.

- use io-thread-pool git repo URL in stack.yaml extra-deps. no longer require
  local copy of that library.
- update docs
- add source URL in pypi metadata.

- update README.rst syntax check command. old check command is deprecated.
- pypi fetch pkg version from Cliversion.hs

- use proper module name hierarchy.

- rd-api, add version info in GET /rd/
- update doc

This option allows combine big file when disk space is low.
it's not enabled by default to allow easy redownload/retry.

- switched to tinylog, it supports log level
- reorganize files to minimize code recompilation
- added --verbose for rd-api
- make FileStatus a data type
- update doc

- rd client: add datetime ts in logging, previously only time is added in log
- rd-api: fix a log msg in processNewFileAsyncMaybe
- fix: update cliVersion to 1.1.2.0

- should use strOption for string parameters.
- also fix rd-api Main, should use cli args parsed result as base config
  in runtimeConfig.
- rd-api now support env variables for all params.

it will act like a static file server

after decimal point