Update API hostname

* porkbun.scm (endpoint): API hostname is now api.porkbun.com.

Signed-off-by: Olivier Dion <olivier.dion@polymtl.ca>

bin/porkbun: Add loggings

Signed-off-by: Olivier Dion <olivier.dion@polymtl.ca>

bin/porkbun: Add wait-until-network switch

Signed-off-by: Olivier Dion <olivier.dion@polymtl.ca>

bin/porkbun: Add poll option

Signed-off-by: Olivier Dion <olivier.dion@polymtl.ca>

initial commit

Signed-off-by: Olivier Dion <olivier-dion@proton.me>