cmd/utils: fix --password on Windows
cmd/utils: fix --password on Windows

Text files created on Windows typically have \r\n line endings.
Trim them when reading password files.

maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum