Refs #39:
- took a shot at autodetection of OpenSSL library version. works only for system-wide install though.
- made rpm.sh to build statically linked tarballs (yass, zlib, libevent). RPMs are still dynamically linked.
Merge branch '2.x' into 3.x

Refs #39 - merging fix to 3.x
Ref #42.  On galeraparameters.rst, added an entry on the legend to indicate user unserviceable parameters, that is parameters that are strictly for troubleshooting purposes, not for production.  For each such parameters, added a superscript T for troubleshooting.  In the description for each entry, strengthened the language to further stress this point.
Merge branch '3.x' of https://github.com/codership/galera into 3.x
Merge codership-3.x upto 29a7463