Appears we cannot disallow this whitespace, since the chunk BNF coexisted

with the implied *LWS rule, before RFC7230 eliminated the later. Whether
this is actually OWS or BWS is an editorial decision beyond our pay grade.

Backports: r1765475
Submitted by: wrowe



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x-merge-http-strict@1772236 13f79535-47bb-0310-9956-ffa450edef68