Fixed import.sh locking

Signed-off-by: Janos SUTO <sj@acts.hu>

util/import.sh

@@ -1,6 +1,5 @@
 #!/bin/bash
 
-set -o nounset
 set -o errexit
 set -o pipefail
 
@@ -8,7 +7,6 @@ export PATH=$PATH:/usr/libexec/piler:/usr/local/libexec/piler
 
 pushd /var/piler/imap
 
-exec 200 > "/tmp/${0}-lock" || exit 1
-flock 200 || exit 1
+[[ "${FLOCKER}" != "$0" ]] && exec env FLOCKER="$0" flock -en "$0" "$0" "$@"
+
 imapfetch.py -i
-flock -u 200