Merge pull request #4 from mzeltner/master

Support s_client args, give -starttls example. Contributed by mzeltner.
Removed neccessity for timeout, thanks to mzeltner. Better parameter parsing with short- and longoptions. Can now pass a path to use any openssl. Now works on OS X.
Fixed variable renaming.
Make mktemp obsolete

We have pipes, we shall use them!
Changed grep invocation to prevent strange grep versions to balk on -E