Add new command-line option to force xfreerdp into a fips compliant mode.

Add new command-line option to force xfreerdp into a fips compliant mode.

This option will ensure that NLA is disabled(since NTLM uses weak crypto algorithms), FIPS
encryption is enabled, and ensure fips mode is enabled for openssl.

Selectively override specific uses of MD5/RC4 with new API calls specifically tailored to override FIPS.

Add comments on why overriding the use of these algorithms under FIPS is acceptable for the locations where overrides happen.

Remove check of server proprietary certificate which was already being ignore to avoid use of MD5.

Initialize winpr openssl earlier to ensure fips mode is set before starting using any crypto algorithms.