nsi/nsh file opening is always displayed regardless of the verbosity level

[GoogleCodeExporter]

Currently the logs are full of messages about the encoding of the included 
files. 

This happens regardless of the verbosity option. I do think that only /V3 or 
even only /V4 should show them.

The /V switch followed by a number between 0 and 4 will set the verbosity of 
output accordingly. 0=no output, 1=errors only, 2=warnings and errors, 3=info, 
warnings, and errors, 4=all output.

Original issue reported on code.google.com by [email protected] on 25 Jul 2013 at 12:57