net/http: add some tests around sending & receiving star requests
net/http: add some tests around sending & receiving star requests

I thought there was still work to do in http2 for this, but I guess
not: the work for parsing them is in net/url (used by http2) and the
handling of OPTIONS * is already in net/http serverHandler, also used
by http2.

But keep the tests.

Change-Id: I566dd0a03cf13c9ea8e735c6bd32d2c521ed503b
Reviewed-on: https://go-review.googlesource.com/18368
Reviewed-by: Blake Mizerany <9064db5bb6ad06c7c3afee8dc1334281c314ed63@gmail.com>
Run-TryBot: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

polyverse-security/go,ganboing/go-esx,cyberroadie/go,derekmarcotte/go,mwhudson/go,miolini/go,linux-on-ibm-z/go,binarycrusader/go,CAFxX/go,golang/go,polyverse-security/go,miolini/go,golang/go,linux-on-ibm-z/go,christopher-henderson/Go,Samurais/go,Samurais/go,josharian/go,polyverse-security/go,akutz/go,momchil-velikov/go,cyberroadie/go,momchil-velikov/go,linux-on-ibm-z/go,vanloswang/go,sndnvaps/go,Samurais/go,sndnvaps/go,derekmarcotte/go,codestation/go,Endika/go,Cofyc/go,codestation/go,cloudflare/go,miolini/go,Endika/go,akutz/go,vsekhar/elastic-go,mwhudson/go,linux-on-ibm-z/go,4ad/go,golang/go,vanloswang/go,momchil-velikov/go,golang/go,josharian/go,binarycrusader/go,golang/go,suncycheng/go,4ad/go,cyberroadie/go,miolini/go,theif519/go,suncycheng/go,vanloswang/go,akutz/go,derekmarcotte/go,binarycrusader/go,4ad/go,4ad/go,codestation/go,akutz/go,4ad/go,suncycheng/go,Samurais/go,polyverse-security/go,momchil-velikov/go,cloudflare/go,Endika/go,momchil-velikov/go,Samurais/go,suncycheng/go,Endika/go,cyberroadie/go,4ad/go,cloudflare/go,nawawi/go,miolini/go,vsekhar/elastic-go,Endika/go,codestation/go,CAFxX/go,sndnvaps/go,vanloswang/go,derekmarcotte/go,cloudflare/go,vanloswang/go,goodlang/good,Samurais/go,theif519/go,miolini/go,cloudflare/go,akutz/go,mwhudson/go,miolini/go,josharian/go,Samurais/go,nawawi/go,linux-on-ibm-z/go,goodlang/good,cloudflare/go,polyverse-security/go,nawawi/go,goodlang/good,vsekhar/elastic-go,codestation/go,ganboing/go-esx,ganboing/go-esx,akutz/go,4ad/go,goodlang/good,nawawi/go,momchil-velikov/go,linux-on-ibm-z/go,theif519/go,momchil-velikov/go,mwhudson/go,josharian/go,cyberroadie/go,codestation/go,4ad/go,binarycrusader/go,goodlang/good,sndnvaps/go,Cofyc/go,momchil-velikov/go,CAFxX/go,akutz/go,linux-on-ibm-z/go,codestation/go,nawawi/go,CAFxX/go,CAFxX/go,ImJasonH/go,mwhudson/go,akutz/go,ImJasonH/go,CAFxX/go,nawawi/go,vsekhar/elastic-go,theif519/go,cyberroadie/go,ImJasonH/go,josharian/go,ganboing/go-esx,Cofyc/go,suncycheng/go,Cofyc/go,sndnvaps/go,binarycrusader/go,vsekhar/elastic-go,vsekhar/elastic-go,goodlang/good,mwhudson/go,derekmarcotte/go,mwhudson/go,goodlang/good,binarycrusader/go,josharian/go,cyberroadie/go,sndnvaps/go,cloudflare/go,golang/go,vanloswang/go,Endika/go,Cofyc/go,theif519/go,ganboing/go-esx,Cofyc/go,theif519/go,ganboing/go-esx,sndnvaps/go,ImJasonH/go,golang/go,derekmarcotte/go,vsekhar/elastic-go,nawawi/go,josharian/go,vanloswang/go,ImJasonH/go,ImJasonH/go,ganboing/go-esx,cloudflare/go,suncycheng/go,polyverse-security/go,Endika/go,Cofyc/go,theif519/go,Endika/go,suncycheng/go,suncycheng/go,derekmarcotte/go,polyverse-security/go,codestation/go,ImJasonH/go,theif519/go,josharian/go,cyberroadie/go,nawawi/go,goodlang/good,vanloswang/go,miolini/go,linux-on-ibm-z/go,binarycrusader/go,vsekhar/elastic-go,Samurais/go,ganboing/go-esx,golang/go,mwhudson/go,polyverse-security/go,sndnvaps/go,CAFxX/go,Cofyc/go,binarycrusader/go,CAFxX/go,derekmarcotte/go,ImJasonH/go