SSL connection readiness is required for level-triggered events only,
broken in r2128

src/event/ngx_event_openssl.c

diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index 40e3712..767320d 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -505,7 +505,10 @@
 
     if (n == 1) {
 
-        c->read->ready = 0;
+        if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
+            c->read->ready = 0;
+        }
+
         c->write->ready = 1;
 
         if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {