fix(nfs): remove dangerous -s flag and unsupported sync option from unfs3

nfs/run.sh

@@ -18,7 +18,6 @@ else
         NETWORK=$(jq -r ".shares[${i}].allowed_network" "${CONFIG}")
         READ_ONLY=$(jq -r ".shares[${i}].read_only" "${CONFIG}")
         ROOT_SQUASH=$(jq -r ".shares[${i}].root_squash" "${CONFIG}")
-        SYNC=$(jq -r ".shares[${i}].sync" "${CONFIG}")
         MOUNT_PATH="/${FOLDER}"
 
         if [ "${READ_ONLY}" = "true" ]; then
@@ -33,10 +32,6 @@ else
             OPTIONS="${OPTIONS},no_root_squash"
         fi
 
-        if [ "${SYNC}" = "true" ]; then
-            OPTIONS="${OPTIONS},sync"
-        fi
-
         OPTIONS="${OPTIONS},insecure"
 
         bashio::log.info "Exporting ${MOUNT_PATH} to ${NETWORK} (${OPTIONS})..."
@@ -53,4 +48,4 @@ cat /etc/exports
 
 # Start unfs3 user-space NFS server in foreground
 bashio::log.info "Starting unfs3 NFS server..."
-exec unfsd -d -s -e /etc/exports
+exec unfsd -d -e /etc/exports