K 10 svn:author V 3 yar K 8 svn:date V 27 2007-06-15T10:10:40.000000Z K 7 svn:log V 166 Make perr() variadic and add perrx() to use in cases where errno is irrelevant. Some code duplication can be reduced if perr() is variadic and perrx() is available. END