DSN (Data Source Name) parser

DSN format:

<driver>://<username>:<password>@<protocol>(<address>)/<database>?param1=value1&...&paramN=valueN

A DSN in its fullest form:

driver://username:password@protocol(address)/dbname?param=value

The address changes depending on the protocol

For TCP/UDP address have the form host:port, example:

pgsql://user:pass@tcp(localhost:5555)/dbname

For protocol unix (Unix domain sockets) the address is the absolute path to the socket, for example:

mysql://user@unix(/path/to/socket)/database

For protocol file (sqlite) use the absolute path as the address, example:

sqlite://@file(/full/unix/path/to/file.db)