Be more expliciti in our error messages if the tmpnam() call fails,
	or we have trouble opening the filename it returns.

PR:		Not a solution, but will help debug several


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@85130 13f79535-47bb-0310-9956-ffa450edef68