misc: ipaddr.h: take const char pointers, add ipaddr_parse_ipv4_prefix_bin() to be consistent
misc: ipaddr.h: take const char pointers, add ipaddr_parse_ipv4_prefix_bin() to be consistent


Git-Host/badvpn,binondord/badvpn,linfengfeiye/badvpn,Git-Host/badvpn,linfengfeiye/badvpn,linfengfeiye/badvpn,tempbottle/badvpn,PowerOlive/badvpn,LazyZhu/badvpn,LazyZhu/badvpn,tempbottle/badvpn,linfengfeiye/badvpn,chrisballinger/badvpn,Git-Host/badvpn,tempbottle/badvpn,LazyZhu/badvpn,chrisballinger/badvpn,binondord/badvpn,PowerOlive/badvpn,LazyZhu/badvpn,binondord/badvpn,Git-Host/badvpn,tempbottle/badvpn,PowerOlive/badvpn,chrisballinger/badvpn,LazyZhu/badvpn,tempbottle/badvpn,binondord/badvpn,linfengfeiye/badvpn,Git-Host/badvpn,PowerOlive/badvpn,chrisballinger/badvpn,binondord/badvpn,PowerOlive/badvpn