TS-4425: Add Ptr<ProxyMutex> overloads for Mutex APIs.
TS-4425: Add Ptr<ProxyMutex> overloads for Mutex APIs.

Add Ptr<ProxyMutex> overloads for various Mutex APIs so that the
callers will not have to call Ptr::get() everywhere.

taoyunxing/trafficserver,davidbz/trafficserver,clearswift/trafficserver,dyrock/trafficserver,bryancall/trafficserver,pbchou/trafficserver,reveller/trafficserver,clearswift/trafficserver,clearswift/trafficserver,taoyunxing/trafficserver,davidbz/trafficserver,dyrock/trafficserver,vmamidi/trafficserver,rahmalik/trafficserver,chenglongwei/trafficserver,duke8253/trafficserver,rpufky/trafficserver,dyrock/trafficserver,persiaAziz/trafficserver,chitianhao/trafficserver,PSUdaemon/trafficserver,pbchou/trafficserver,chitianhao/trafficserver,reveller/trafficserver,duke8253/trafficserver,duke8253/trafficserver,persiaAziz/trafficserver,PSUdaemon/trafficserver,rahmalik/trafficserver,chenglongwei/trafficserver,rahmalik/trafficserver,vmamidi/trafficserver,persiaAziz/trafficserver,duke8253/trafficserver,bryancall/trafficserver,rpufky/trafficserver,persiaAziz/trafficserver,rpufky/trafficserver,taoyunxing/trafficserver,taoyunxing/trafficserver,clearswift/trafficserver,chenglongwei/trafficserver,reveller/trafficserver,SolidWallOfCode/trafficserver,persiaAziz/trafficserver,pbchou/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,clearswift/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,PSUdaemon/trafficserver,chitianhao/trafficserver,PSUdaemon/trafficserver,chenglongwei/trafficserver,rahmalik/trafficserver,rahmalik/trafficserver,taoyunxing/trafficserver,dyrock/trafficserver,reveller/trafficserver,reveller/trafficserver,reveller/trafficserver,chenglongwei/trafficserver,taoyunxing/trafficserver,bryancall/trafficserver,chenglongwei/trafficserver,duke8253/trafficserver,taoyunxing/trafficserver,persiaAziz/trafficserver,SolidWallOfCode/trafficserver,reveller/trafficserver,rpufky/trafficserver,davidbz/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,bryancall/trafficserver,dyrock/trafficserver,chenglongwei/trafficserver,PSUdaemon/trafficserver,rahmalik/trafficserver,chitianhao/trafficserver,PSUdaemon/trafficserver,rahmalik/trafficserver,rpufky/trafficserver,clearswift/trafficserver,dyrock/trafficserver,PSUdaemon/trafficserver,persiaAziz/trafficserver,rpufky/trafficserver,clearswift/trafficserver,duke8253/trafficserver,persiaAziz/trafficserver,duke8253/trafficserver,chenglongwei/trafficserver,PSUdaemon/trafficserver,rpufky/trafficserver,bryancall/trafficserver,davidbz/trafficserver,pbchou/trafficserver,taoyunxing/trafficserver,rpufky/trafficserver,SolidWallOfCode/trafficserver,clearswift/trafficserver,SolidWallOfCode/trafficserver,taoyunxing/trafficserver,chitianhao/trafficserver,chitianhao/trafficserver,chitianhao/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,reveller/trafficserver,rpufky/trafficserver,PSUdaemon/trafficserver,clearswift/trafficserver,reveller/trafficserver,dyrock/trafficserver,rahmalik/trafficserver,rahmalik/trafficserver