docs: update roadmap and task tracking

- README: update feature list
- ROADMAP: add completed features, update priorities
- TODO: mark completed tasks, add new items
- config.ini.sample: update example values
- http2: minor cleanup

config.ini.sample

@@ -4,6 +4,7 @@ tor_hosts = 127.0.0.1:9050
 [watchd]
 max_fail = 5
 threads = 10
+min_threads = 5
 timeout = 9
 submit_after = 200
 use_ssl = 0
@@ -26,8 +27,7 @@ threads = 3
 tor_safeguard = 0
 
 [scraper]
-
-[flood]
+enabled = 1
 
 [httpd]
 listenip = 127.0.0.1