src/upgrade_sources_conf_default.tcl - display warning when unable to add default tag
src/upgrade_sources_conf_default.tcl - display warning when unable to add default tag

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@43140 d073be05-634f-4543-b044-5fe20cf6d1d6

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