TS-552: Trivial Autoconf cleanup
TS-552: Trivial Autoconf cleanup

We dropped exc_capture_context() and MLD_demangle_string()
along with support for the Alpha architecture.

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