Fix previous sync of struct definitions with upstream.
Fix previous sync of struct definitions with upstream.

Change-Id: I53fe355ac0ebfaf43f33a955a226e45034dbde95
Signed-off-by: Piotr Sikora <321b1a11e6b8c7ca12f1b0b438664e52a48b555e@frickle.com>

ainoya/ngx_cache_purge,lilien1010/ngx_cache_purge,FRiCKLE/ngx_cache_purge,FRiCKLE/ngx_cache_purge,lilien1010/ngx_cache_purge,ainoya/ngx_cache_purge