Make -o respect specified, or default, -a value
Make -o respect specified, or default, -a value

Currently, -o always uses 127.0.0.1 as the host.
shairez/http-server,hancharou/http-server,hugomn/http-server,nickdesaulniers/http-server,ngs/http-server,johnnymitch/http-server,danielweck/http-server,wwb568109135/http-server,georgebbbb/http-server,danielweck/http-server,georgebbbb/http-server,imjerrybao/http-server,indexzero/http-server,imjerrybao/http-server,wolfsilver/http-server,indexzero/http-server,hancharou/http-server,wolfsilver/http-server,cvan/http-server-gzip,cvan/http-server-gzip,tamamadesu/http-server,ngs/http-server,nishant8BITS/http-server,wwb568109135/http-server,nickdesaulniers/http-server,hugomn/http-server,impleri/http-server,tamamadesu/http-server,shairez/http-server,nishant8BITS/http-server,johnnymitch/http-server,impleri/http-server,WillJHaggard/http-server,WillJHaggard/http-server,gstack/watch-http-server