Patch release for 3.8.0
Fixes:
- Fixed #1608 #1623 #1644 Crash in
[NSURLCache cachedResponseForRequest:]
- the fix is actually avoiding to accessNSURLCache
which appears to generate a race condition. We only call it if necesarry (SDWebImageRefreshCached
is used and the image cannot be cached by the system when it's too big or behind authentication)