Map Tweaknews secret variable aliases in configure-usenet

Accept TWEAKNEWSLOGIN, TWEAKNEWSPASSWORD, TWEAKNEWSAPI (as host),
TWEAKNEWSSSLPORT, and TWEAKNEWSCONNECTIONS from secrets/.env.

secrets/.env.example

@@ -1,27 +1,26 @@
 # Copy to secrets/.env and fill in. NEVER commit secrets/.env
-# Used by scripts/configure-usenet.sh and as a personal password vault.
+# scripts/configure-usenet.sh accepts these names (and a few aliases).
 
-# --- NZBgeek (indexer — wire in Prowlarr) ---
-NZBGEEK_USERNAME=
-NZBGEEK_EMAIL=
-# API key from nzbgeek.info account (not the base URL)
-NZBGEEK_API_KEY=
-# Optional base URL (default https://api.nzbgeek.info/)
-NZBGEEK_URL=https://api.nzbgeek.info/
+# --- NZBgeek (Prowlarr indexer) ---
+NZBGEEKUSERNAME=
+NZBGEEKEMAIL=
+NZBGEEKAPI=https://api.nzbgeek.info/
+# API key (also accepted as NZBGEEK_API_KEY)
+NZBKEEPKEY=
 
-# --- Newshosting (Usenet provider — SABnzbd server) ---
-NEWSHOSTING_HOST=news.newshosting.com
-NEWSHOSTING_PORT=563
-NEWSHOSTING_SSL=1
-NEWSHOSTING_USER=
-NEWSHOSTING_PASS=
-# Connections: start ~20 (plan-dependent)
-NEWSHOSTING_CONNECTIONS=20
+# --- Newshosting (Usenet / SABnzbd) ---
+# NEWSHOSTINGAPI is the NNTP host hostname
+NEWSHOSTINGAPI=news.newshosting.com
+NEWSHOSTINGSSLPORT=563
+NEWSHOSTINGUSER=
+# also accepted: NEWSHOSTING_PASS, NEWSHOSTINGPASS
+HNEWSHOSTINGPASS=
+NEWSHOSTINGCONNECTIONS=20
 
-# --- Tweaknews (Usenet provider / fill-in block) ---
-TWEAKNEWS_HOST=news.tweaknews.eu
-TWEAKNEWS_PORT=563
-TWEAKNEWS_SSL=1
-TWEAKNEWS_USER=
-TWEAKNEWS_PASS=
-TWEAKNEWS_CONNECTIONS=10
+# --- Tweaknews (Usenet / SABnzbd) ---
+# TWEAKNEWSAPI is the NNTP host (e.g. news.tweaknews.eu or newshosting.tweaknews.eu)
+TWEAKNEWSAPI=news.tweaknews.eu
+TWEAKNEWSSSLPORT=563
+TWEAKNEWSLOGIN=
+TWEAKNEWSPASSWORD=
+TWEAKNEWSCONNECTIONS=40