implement ssd-friendly keep index to cleanup removed entries on fof/upload sync; drop external rsync option

README.md

@@ -26,45 +26,10 @@ cargo install flarumdown
 ``` bash
 RUST_LOG=warn flarumdown -s '/path/to/flarum.sqlite' \
                          -t '/path/to/target' \
+                         -p '/path/to/public' \
                          -i index \
                          -r http://[202:68d0:f0d5:b88d:1d1a:555e:2f6b:3148] \
                          -r http://[505:6847:c778:61a1:5c6d:e802:d291:8191] \
                          -r http://hc3fycfadz7fkapp62fqi6llioe46fvis6wuswfobl5ghc2u7snq.b32.i2p \
                          -r http://w6vtcpbir5vvokwdqqbqlrdtnzwyfc4iyqn6owxuyjeppszuydutqwqd.onion
-```
-
-### rsync
-
-Optionally, delegate `-u` to `rsync` by using `crontab -e`:
-
-``` bash
-#!/bin/bash
-
-mkdir -p /var/www/flarum/public/flarumdown/dump/assets/files
-
-# collect FoF/upload files
-readonly RSYNC_FILTER_P="*-thumb.webp"
-readonly RSYNC_TARGET_D="/var/www/flarum/public/flarumdown/dump/assets"
-find "$RSYNC_TARGET_D" -name "$RSYNC_FILTER_P" -type f -delete # rsync has --filter, cleanup
-/usr/bin/rsync -av --delete --filter="-p $RSYNC_FILTER_P" \
-		/var/www/flarum/public/assets/files \
-		$RSYNC_TARGET_D
-
-# dump the DB
-RUST_LOG=warn /usr/local/bin/flarumdown -s /var/www/flarum/flarum.sqlite \
-					-t /var/www/flarum/public/flarumdown/dump \
-					-i index \
-					-r http://[202:68d0:f0d5:b88d:1d1a:555e:2f6b:3148] \
-					-r http://[505:6847:c778:61a1:5c6d:e802:d291:8191] \
-					-r http://hc3fycfadz7fkapp62fqi6llioe46fvis6wuswfobl5ghc2u7snq.b32.i2p \
-					-r http://w6vtcpbir5vvokwdqqbqlrdtnzwyfc4iyqn6owxuyjeppszuydutqwqd.onion
-
-# create .zip file to simply download for offline reading
-readonly TARGET_DIR=/var/www/flarum/public/flarumdown/dump
-cd "$TARGET_DIR"
-if [ "$(pwd)" != "$TARGET_DIR" ]; then
-	echo "Unexpected path!"
-	exit 1
-fi
-zip -r -9 /var/www/flarum/public/flarumdown/dump.zip .
 ```