revset-limit: remove usage of `set()`
All smartset classes have fast lookup, so this function will be removed soon.
FROM saltstack/centos-5-minimal
RUN yum install -y gcc make rpm-build gettext tar
RUN yum install -y python-devel python-docutils
# For creating repo meta data
RUN yum install -y createrepo
RUN yum install -y readline-devel openssl-devel ncurses-devel zlib-devel bzip2-devel