Fix variable definition in proxy.h ld fails as the variable is allocated via proxy.h multiple times by every c file including that file: > ld: proxy_upstream.o:proxy.h:170: multiple definition of `portname'; proxy_loop.o:proxy.h:170: first defined here > ld: proxy_upstream.o:proxy.h:170: multiple definition of `out_portname'; proxy_loop.o:proxy.h:170: first defined here > ld: proxy_upstream.o:proxy.h:171: multiple definition of `port'; proxy_loop.o:proxy.h:171: first defined here > ld: proxy_upstream.o:proxy.h:171: multiple definition of `out_port'; proxy_loop.o:proxy.h:171: first defined here
