TRQ-2560. Fix a deadlock found in PGetNodeFromAddr().
Change some defaults so that we perform better under stress. max_threads now default to 13 * min_threads instead of 10 times, and the request pool now gets 75% of available threads with the background task pool getting 25% of available threads. Previously it was 2/3 and 1/3, but under stress testing these percentages gave us better results.
Merge branch 'feature/ascent' of https://github.com/adaptivecomputing/torque into feature/ascent