Solution : https://service.sap.com/sap/support/notes/1475840 (SAP Service marketplace login required)
Key words : 
symptom security functions, note 866020are missing, sp patch level, patch level, sap_basis versions 620, terms cl_http_utility, jscript encode, java_script reason, sap_basis package, solution install
Related Notes : 
       
| 1582870 | ABAP XSS Escaping Support | 
| 1476973 | |
| 1476347 | |
| 1468542 | |
| 1417568 | |
| 881384 | Responsibility for some ICF help functions | 
| 866020 |