WeebCentral and MangaPill are off by default, with an admin switch per source

Both are unofficial sites that mostly host unlicensed copies; MangaDex (official
API) stays on. Settings → Admin → Scraper → Hoster settings has a 'Use <source>'
switch. A switched-off source refuses new jobs, keeps queued jobs waiting and is
skipped by nightly update checks. Installations whose queue or history already
used a source keep it switched on, so upgrades don't stop a working queue.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -75,8 +75,10 @@ URLs, so a sub-path like `/manga/` works.
 
 ### Sources and copyright
 
-The scraper can download from WeebCentral, MangaDex and MangaPill, and peering can copy chapters between
-servers. You are responsible for only downloading and sharing what you are allowed to copy where you live,
+The scraper can download from MangaDex (on by default; official API) and from WeebCentral and MangaPill.
+The last two are unofficial sites that mostly host unlicensed copies, so they are **off by default**. An admin
+can switch each one on under **Settings → Admin → Scraper → Hoster settings**. Peering can copy chapters
+between servers. You are responsible for only downloading and sharing what you are allowed to copy where you live,
 and for respecting each site's terms. The scraper is deliberately slow and stops on access errors; it never
 bypasses CAPTCHAs, logins or other access controls ([scraper/AGENT_RUNBOOK.md](scraper/AGENT_RUNBOOK.md)).