DBAL-1121: [GH-777] Make host and server connection parameters optional for sqlanywhere driver

[doctrinebot]

Jira issue originally created by user @doctrinebot:

This issue is created automatically through a Github pull request on behalf of deeky666:

Url: https://github.com/doctrine/dbal/pull/777

Message:

This patch makes it possible to connect to a SQL Anywhere database without having to specify host and/or server connection parameter. The original assumption that the server parameter is necessary to connect to the database was wrong. It is only required if the host is running multiple named server instances and a specific instance should be connected to. Also if the host parameter is not specified, it will default to localhost now. The LINKS DSN parameter was replaced by the simpler and encouraged HOST parameter as the LINKS parameter is only required if you want to pass specific TCP/IP options.

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-777] was assigned: https://github.com/doctrine/dbal/pull/777

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-777] was merged: https://github.com/doctrine/dbal/pull/777

[doctrinebot]

Issue was closed with resolution "Fixed"

[github-actions[bot]]

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