waits until the condition is cleared. Without this mode, a typical user would probably do something like: oh, <a class="el" href="classipc_1_1session_1_1Client__session__mv.html#ab971ea979200828d572638c60d7d9f44" title="To be invoked in NULL state only, and not as-if default-cted, it synchronously and non-blockingly att...">sync_connect()</a> failed; let's sleep 1 sec and try again (rinse/repeat). It's not awful, but we might as well make it easier and more responsive out of the box (optionally). Upon resol