php: convert to addon

Signed-off-by: Stephan Raue <stephan@openelec.tv>
wxWidgets: fix download url

Signed-off-by: Stephan Raue <stephan@openelec.tv>
whois: update to whois-5.1.1

Signed-off-by: Stephan Raue <stephan@openelec.tv>