title: What does RTNL mean?
body: <p>I am looking at the Connection Manager (ConnMan) source code, which is a tool for Linux(-like) systems to manage networks. One of the (undocumented) source files has the vague naming <code>rtnl.c</code>. Does anybody know, what is meant with RTNL? Googling for it was not very effective. Every site that really is connected to networks and RTNL seems to be written by and for people who already know what it means.</p>
  
  <p>Because in one answer there is some discussion about some different ConnMan sources, I am using the one available from:</p>
  
  <p>git://git.kernel.org/pub/scm/network/connman/connman.git</p>