CLEANUP: session: remove event_accept() which was not used anymore

Remove event_accept() in include/proto/proto_http.h and use correct function
name in other two files instead of event_accept().

Signed-off-by: Godbach <nylzhaowei@gmail.com>
diff --git a/include/types/session.h b/include/types/session.h
index 00ed4cb..42d37db 100644
--- a/include/types/session.h
+++ b/include/types/session.h
@@ -97,7 +97,7 @@
 #define SN_BE_TRACK_ANY 0x00E00000      /* union of all SN_BE_TRACK_* above */
 
 
-/* WARNING: if new fields are added, they must be initialized in event_accept()
+/* WARNING: if new fields are added, they must be initialized in session_accept()
  * and freed in session_free() !
  */