...
On affected platforms (RH6+, CentOS 6+, etc.), the shibboleth packages now depend on this look-aside package and ensure its installation in the normal fashion. The /etc/sysconfig/shibd script in v6 and /etc/systemd/system/multi-user.target.wants/shibd.service in v7(due to the Linux distributions moving from init to systemd) installed for you will also include a LD_LIBRARY_PATH variable that directs the shibd process to load the alternative version of libcurl.so instead of the normal one.
...