fcl-xml unknown encoding

Original Reporter info from Mantis: BeniBela @benibela

• Reporter name: Benito van der Zander

Description:

The encoding "us-ascii" is unknown

It is such a simple encoding, it should really be among the defaultly known encodings

Mantis conversion info:

• Mantis ID: 29571
• Build: r33011
• Version: 3.1.1