Resolves: fdo#85617 always store fully encoded external document name
Resolves: fdo#85617 always store fully encoded external document name

Also OOXML calls these API functions, this is the central place to handle it.

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core