Eliminate duplicately resolved addresses for host access specs.
Eliminate duplicately resolved addresses for host access specs.

When creating the list of resolved addresses for a given host name,
do not add duplicate addresses to the list. This avoids false
permission clashes which can occur when the same address is
processed more than once.

Fixes qa test case 051 for --without-secure-sockets builds.

wuliming/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,mbaldessari/pcp,mbaldessari/pcp,tjanez/pcp,edwardt/pcp,prasincs/pcp,wuliming/pcp,aeg-aeg/pcpfans,adfernandes/pcp,andyvand/cygpcpfans,prasincs/pcp,andyvand/cygpcpfans,mbaldessari/pcp,prasincs/pcp,mbaldessari/pcp,adfernandes/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,aeg-aeg/pcpfans,prasincs/pcp,tjanez/pcp,adfernandes/pcp,aeg-aeg/pcpfans,prasincs/pcp,tjanez/pcp,adfernandes/pcp,adfernandes/pcp,mbaldessari/pcp,tjanez/pcp,prasincs/pcp,edwardt/pcp,aeg-aeg/pcpfans,wuliming/pcp,edwardt/pcp,adfernandes/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,tjanez/pcp,edwardt/pcp,andyvand/cygpcpfans,wuliming/pcp,andyvand/cygpcpfans,wuliming/pcp,wuliming/pcp,edwardt/pcp,edwardt/pcp,mbaldessari/pcp,wuliming/pcp,aeg-aeg/pcpfans,adfernandes/pcp,andyvand/cygpcpfans,prasincs/pcp,tjanez/pcp,tjanez/pcp,wuliming/pcp,edwardt/pcp,adfernandes/pcp,edwardt/pcp,tjanez/pcp,prasincs/pcp