Rex highlighting for vim

rex.vim

# put this file into ~/.vim/after/syntax/perl/rex.vim and then remove this line
syn keyword perlStatementScalar     after after_task_finished before before_task_start bios_boot cache cat case checkout command content create_home delete_lines_according_to delete_lines_matching do_task desc download ensure entry extract group groups_file home initialize is_dir is_file is_symlink key_auth kmod line LOCAL ls mode needs no_overwrite no_ssh on_change on_rollback only_if options owner parallelism partition pass_auth password path private_key public_key regexp report repository rm sayformat share size source ssh_key sudo sudo_password transaction type umount unless unlink update_package_db update_system user upload
syn keyword perlStatementList       account append_if_no_such_line append_or_amend_line batch can_run chgrp chmod chown clearpart cmdb cp create_user cron_entry file get i_run ln mount mv pkg run run_task say sed service symlink task template
syn keyword perlStatementHash       environment set
syn keyword perlString              FALSE TRUE
syn match   perlStatementHash       "auth for"