header removed in libressl

Index: Pdf4QtLibCore/sources/pdfcertificatemanager.cpp
--- Pdf4QtLibCore/sources/pdfcertificatemanager.cpp.orig
+++ Pdf4QtLibCore/sources/pdfcertificatemanager.cpp
@@ -40,7 +40,6 @@
 
 #include <openssl/bio.h>
 #include <openssl/rsa.h>
-#include <openssl/rsaerr.h>
 #include <openssl/x509.h>
 #include <openssl/evp.h>
 #include <openssl/pem.h>
