des f202203775 Ignore HTTP_PROXY if it is defined but empty. This was already handled
correctly in the case of FTP_PROXY, because an empty FTP_PROXY has a
specific meaning ("don't use any proxy at all for ftp, even if HTTP_PROXY
is defined"), while an empty HTTP_PROXY has no meaning at all.

PR:		bin/85185
Submitted by:	Conall O'Brien <conallob=freebsd@maths.tcd.ie>
MFC after:	2 weeks
2005-08-24 12:28:05 +00:00
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