Incorrect connection string parsing when unsupported options are present

[staticlibs]

When unsupported options are included in the connection string, the driver aborts the parsing and does not process the (supported) options that are specified later in the connection string.

For example, with a driver registered in odbcinst.ini like this:

[DuckDB Driver]
Description=DuckDB Driver
Driver=/path/to/libduckdb_odbc.so

The allow_unsigned_extensions option can processed correctly:

Python 3.12.8 (main, Dec  6 2024, 00:00:00) [GCC 14.2.1 20240912 (Red Hat 14.2.1-3)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyodbc
>>> print(pyodbc.connect("Driver={DuckDB Driver};allow_unsigned_extensions=true;").cursor().execute("select current_setting('allow_unsigned_extensions')").fetchone())
('true',)

But it won't be set if some unsupported option precedes it:

>>> print(pyodbc.connect("foo=bar;Driver={DuckDB Driver};unsupported_option_1=value_1;allow_unsigned_extensions=true;").cursor().execute("select current_setting('allow_unsigned_extensions')").fetchone())
('false',)

Besides that, the DSN name is ignored even when it is specified before the unsupported option, with the odbc.ini like this:

[DuckDB]
Driver = DuckDB Driver
database = /path/to/test1.db

>>> print(pyodbc.connect("DSN=DuckDB;").cursor().execute("select current_catalog()").fetchone())
('test1',)

>>> print(pyodbc.connect("DSN=DuckDB;unsupported_option_1=value_1;").cursor().execute("select current_catalog()").fetchone())
('memory',)