Set timeouts for curl transfers.  Some connections to sketchy mirror sites can hang forever otherwise. Discussed with:    pguyot Tested on:    	flathead
Set timeouts for curl transfers.  Some connections to sketchy mirror
sites can hang forever otherwise.
Discussed with:    pguyot
Tested on:    	flathead

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@15739 d073be05-634f-4543-b044-5fe20cf6d1d6

macports/macports-base,neverpanic/macports-base,neverpanic/macports-base,macports/macports-base,danchr/macports-base,danchr/macports-base