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If args is an empty string, apr_strtok will return NULL and *last will never get set which results in a SIGSEGV in apr_isspace check Submitted by: Thomas Meyer <thomas@m3y3r.de> Github: closes #503 Follow-up to r1922931. In set_cookie_name() and set_cookie_name2(), now that the empty 'name' argument is explicitly handled, the error message in check_string() can be simplified because the cookie name can't be empty anymore when this function is called. Add a change entry to give credits to the author. Merges r1922931, r1926188, r1926189 trunk Submitted by: covener, jailletc36, jailletc36 Reviewed by: jailletc36, rpluem, ylavic git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1926325 13f79535-47bb-0310-9956-ffa450edef68