Refactored the unix child channel code to use the tao/util.h file descriptor message handling code.
Refactored the unix child channel code to use the tao/util.h file descriptor
message handling code.

jethrogb/cloudproxy,William-J-Earl/cloudproxy,tmroeder/cloudproxy,jethrogb/cloudproxy,jethrogb/cloudproxy,cjpatton/cloudproxy,jlmucb/cloudproxy,kevinawalsh/cloudproxy,tmroeder/cloudproxy,William-J-Earl/cloudproxy,jlmucb/cloudproxy,jlmucb/cloudproxy,William-J-Earl/cloudproxy,tmroeder/cloudproxy,tmroeder/cloudproxy,cjpatton/cloudproxy,cjpatton/cloudproxy,cjpatton/cloudproxy,William-J-Earl/cloudproxy,cjpatton/cloudproxy,jethrogb/cloudproxy,William-J-Earl/cloudproxy,jlmucb/cloudproxy,jethrogb/cloudproxy,kevinawalsh/cloudproxy,jlmucb/cloudproxy,tmroeder/cloudproxy