lighttpd: Add patch for reuse large memory chunks

Added 0001-core-reuse-large-mem-chunks-fix-mem-usage-fixes-3033.patch
to fix large memory usage for large file downloads
from dynamic backends reuse or release large memory chunks.

Also, added patch to set default chunk size 8k earlier it was 4k.

This issue is caused by a bug in the lighttpd 1.4.55 version and
has been fixed in lighttpd 1.4.58. Hence, it is not needed for
master and hardknott branch because lighttpd has 1.4.59 version.

Link: https://redmine.lighttpd.net/projects/lighttpd/repository/14/revisions/7ba521ffb4959f6f74a609d5d4acafc29a038337
Link: https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/304e46d4f808c46cbb025edfacf2913a30ce8855



Signed-off-by: Purushottam Choudhary <purushottamchoudhary29@gmail.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>