Fix openssl >= 1.1 detection without pkg-config file.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 5de71676ac)

CMakeLists.txt

@@ -921,11 +921,20 @@ if( WITH_SSL )
   pkg_search_module( SSL openssl )
   if( NOT SSL_FOUND )
     check_include_file( openssl/ssl.h HAVE_OPENSSL_H )
-    check_library_exists( ssl SSL_library_init "" HAVE_LIBSSL )
+    check_library_exists( ssl OPENSSL_init_ssl "" HAVE_LIBSSL_11 )
+    if( NOT HAVE_LIBSSL_11 )
+      check_library_exists( ssl SSL_library_init "" HAVE_LIBSSL )
+    endif( )
     check_library_exists( crypto EVP_EncryptInit_ex "" HAVE_LIBCRYPTO )
-    if( HAVE_OPENSSL_H AND HAVE_LIBSSL AND HAVE_LIBCRYPTO )
+    if( HAVE_OPENSSL_H AND (HAVE_LIBSSL_11 OR HAVEL_LIBSSL) AND HAVE_LIBCRYPTO )
       set( SSL_FOUND 1 CACHE INTERNAL "" FORCE )
-    endif( HAVE_OPENSSL_H AND HAVE_LIBSSL AND HAVE_LIBCRYPTO )
+      find_file( OPENSSLV_H openssl/opensslv.h )
+      file( STRINGS "${OPENSSLV_H}" SSL_VERSION REGEX "#[ \t]*define[ \t]*OPENSSL_VERSION_TEXT" )
+      string( REGEX REPLACE "# *define[ \t]*OPENSSL_VERSION_TEXT[ \t]*\"[^0-9 ]* *([^ ]*).*" "\\1"
+              SSL_VERSION "${SSL_VERSION}" )
+      set( SSL_VERSION "${SSL_VERSION}" CACHE INTERNAL "" FORCE )
+      message( STATUS "Found OpenSSL: version ${SSL_VERSION}" )
+    endif( HAVE_OPENSSL_H AND (HAVE_LIBSSL_11 OR HAVEL_LIBSSL) AND HAVE_LIBCRYPTO )
   endif( NOT SSL_FOUND )
   if( NOT SSL_FOUND )
     tde_message_fatal( "SSL support is requested, but openssl not found on your system" )