Fix compatibility with nginx-0.8.48+.

Change-Id: Ibc695eb973e0b61448ed3cd965e1eb63d43878d9
Signed-off-by: Piotr Sikora <piotr.sikora@frickle.com>
Fix compatibility with nginx-1.1.12+.

Due to the changes in cache index usage accounting (1 per request
instead of 1 per access) initial cache insert of "small" file was
decreasing usage count, rendering index entry invalid.

Because cache manager ignores invalid entries, expired cache files
were not being removed from the cache, which forced it to outgrow
specified "max_size" value.

Change-Id: Ifd22d0ba53bed270109241a014eec2a6b0b2950d
Signed-off-by: Piotr Sikora <piotr.sikora@frickle.com>
Update nginx compatibility list.

Change-Id: I566cac0e1b61c818247a4bfaad51e703df1664ad
Signed-off-by: Piotr Sikora <piotr.sikora@frickle.com>
Update CHANGES (releng for 1.10).

Change-Id: I3a9038ccffc418a8bd854c4dc3ced8cc8fac6d06
Signed-off-by: Piotr Sikora <piotr.sikora@frickle.com>