Revert "(#3904)  Handle redirected and missing URLs sanely in the curl plug-in."

This reverts commit 1093c756f48863db4f2d35170696e8d858cf62a7.

Conflicts:

	src/condor_filetransfer_plugins/curl_plugin.c
Merge branch 'V8_0_3-branch' of ssh://ingwe.cs.wisc.edu/p/condor/repository/CONDOR_SRC into V8_0_3-branch
Merge remote-tracking branch 'origin/V8_0_3-branch' into V8_0-branch