Log Message:
databases/freetds: update to 1.00.55.

Summary of Changes in release 1.0
--------------------------------------------
User visible (not in a particular order):
- Removed "8.0" from protocol version string accepted. Please
  update configuration files;
- Default protocol version is now auto. This could slow down
  connection but make user experience less painful;
- Sybase encrypted login. Set encryption to get it;
- Support protocol version 7.4;
- Add intent support to specify we don't want to change data;
- Allow to attach database file during the login (MS SQL Server);
- Support for Sybase time/date/bigdate/bigdatetime;
- Pool is working again;
- ODBC BCP (not complete);
- Improved dbconvert and dbconvert_ps (more compatible);
- Fixed dbspid;
- Improved ODBC type information;
- Better certificate verification;
- AppVeyor is used for every build;
- Try all IPs from DNS. This allows SQL Cluster connection
  to secondary servers.

Implementation:
- Removed Nmake support;
- Type conversions simplified;
- Better type handle code.