Update to latest stable version 1.2.0.
*) Bugfix: a segmentation fault might occur in a worker process if the
"try_files" directive was used; the bug had appeared in 1.1.19.
*) Bugfix: response might be truncated if there were more than IOV_MAX
*) Bugfix: in the "crop" parameter of the "image_filter" directive.
Thanks to Maxim Bublis.