* modules/http/http_filters.c (parse_chunk_size): Reduce by four the

* modules/http/http_filters.c (parse_chunk_size): Reduce by four the
  limit to the number of bits that can be handled in a chunk size, to
  avoid undefined behaviour bitshifting a signed integer left.  Max
  chunk size on 32-bit arch is now 32MiB.  Avoids UBSan error in:

http_filters.c:227:46: runtime error: left shift of 768614336404564650 by 4 places cannot be represented in type 'long int'

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1874102 13f79535-47bb-0310-9956-ffa450edef68