title: Curator InterProcessMutex vs InterProcessSemaphoreMutex
body: <p>What's the difference between <code>InterProcessMutex</code> vs <code>InterProcessSemaphoreMutex</code>? The <a href="http://curator.apache.org/curator-recipes/index.html" rel="nofollow noreferrer">docs</a> say <code>InterProcessSemaphoreMutex</code> is the same  <code>InterProcessMutex</code> except it's not <strong><em>reentrant</em></strong>. But I don't know what <strong><em>reentrant</em></strong> means.</p>