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

bakhet/badvpn,henryhwang/badvpn,ambrop72/badvpn-googlecode-export,Qnex93/badvpn,arevindh/badvpn,Qnex93/badvpn,ambrop72/badvpn-googlecode-export,atavism/badvpn,nuwaf/badvpn,bawaaaaah/badvpn,bakhet/badvpn,Rastii/badvpn,Rastii/badvpn,kaliii/badvpn,Qnex93/badvpn,adelshokhy112/badvpn,nuwaf/badvpn,nuwaf/badvpn,Rastii/badvpn,walterDurin/badvpn,fffw/badvpn,atavism/badvpn,nuwaf/badvpn,kaliii/badvpn,bawaaaaah/badvpn,kaliii/badvpn,fragmede/badvpn,fragmede/badvpn,henryhwang/badvpn,kaliii/badvpn,Rastii/badvpn,fffw/badvpn,adelshokhy112/badvpn,Qnex93/badvpn,nuwaf/badvpn,fffw/badvpn,bakhet/badvpn,Rastii/badvpn,Qnex93/badvpn,walterDurin/badvpn,fragmede/badvpn,henryhwang/badvpn,arevindh/badvpn,henryhwang/badvpn,atavism/badvpn,arevindh/badvpn,adelshokhy112/badvpn,bakhet/badvpn,bawaaaaah/badvpn,bawaaaaah/badvpn,ambrop72/badvpn-googlecode-export,fffw/badvpn,walterDurin/badvpn,arevindh/badvpn,atavism/badvpn,fffw/badvpn,arevindh/badvpn,walterDurin/badvpn,ambrop72/badvpn-googlecode-export,kaliii/badvpn,fragmede/badvpn,atavism/badvpn,adelshokhy112/badvpn,fragmede/badvpn,ambrop72/badvpn-googlecode-export,bakhet/badvpn,bawaaaaah/badvpn,henryhwang/badvpn,adelshokhy112/badvpn,walterDurin/badvpn