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

auto invalidate all cached blocks.

all blocks are fetched.

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.

- 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

For port number, if parse fail, it will exit on start up.
previously env var with parse error are ignored silently.

- 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

- moved version string to CliVersion module
- update pypi Makefile to check README.rst syntax before creating wheel

tinylog is based on fast-logger and supports log levels.
I need log level support in rd client, for the --verbose option.

- use fast-logger to do logging
- use ExceptT to do early return
- extract getRdHandler and DB functions, code is more clean now

code removed from this repo.

dropped async, used self implemented Task.

add help doc for rd-api

- update "debug opts" to use putStrLn. no stupid quotes around string.
- add retry support for fetchBlockFromHttp (--block-max-retry)
- check http status code
  expect 200 on GET /rd/file.
  expect 206 on GET /file with Range header.
- handle http exceptions
- handle IOError at critical places.
- on client tool, use MaybeT to do early return, avoid shifting to the right.
- fix -f -v wrong option position in parser.
- other small fixes.

- enable -Wall -Werror in package.yaml
  fix issues
- support "pending" blocks. client will do incrementally download until
  all blocks are ready on server side and fetched to local disk.
- bugfix: fileWorker missing "forever" loop.
- moved genBlocks to RD.Lib

bugfix: worker should close file when done

sha1sum works fine with lazy ByteString.