Increment required pykerberos version to 1.1.10

The last release added support for KDC verification which requires pykerberos 1.1.10 or older. The requirements for this package have been updated accordingly.

This also includes a typo fix for an error message.

Adding KDC verification support

This version adds support for verification of the KDC when using pykerberos. This is achieved using the local keytab file and can be disabled in the configuration.

If your system does not have a valid keytab file, this upgrade will break authentication.

kerberos-sspi on Windows

Use kerberos-sspi instead of pykerberos on Windows for better compatibility