Shibboleth Service Provider (SP) v2.x Installation on Debian Etch

Currently, there is no stable Debian packager for Shibboleth2. Therefore, we need to compile and install Shib 2.x ourselfs.

https://www.switch.ch/aai/docs/shibboleth/SWITCH/2.1/sp/deployment/debian-etch-source.html provides a perfect description. So, we will closely rely on it, but outline the specifics for EDIT federations.