net/http: add more debugging to TestServerAllowsBlockingRemoteAddr
net/http: add more debugging to TestServerAllowsBlockingRemoteAddr

It fails on Solaris often, but nowhere else.

Not sure why. Add some debugging.

Change-Id: I79fc710bd339ae972d624c73a46bd8d215729c10
Reviewed-on: https://go-review.googlesource.com/37659
Reviewed-by: Josh Bleecher Snyder <cdc248cc4d32e4fbfe04e45228163bcecd48a0b9@gmail.com>
Run-TryBot: Josh Bleecher Snyder <cdc248cc4d32e4fbfe04e45228163bcecd48a0b9@gmail.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

nawawi/go,vsekhar/elastic-go,polyverse-security/go,codestation/go,CAFxX/go,nawawi/go,polyverse-security/go,ImJasonH/go,linux-on-ibm-z/go,CAFxX/go,derekmarcotte/go,josharian/go,vsekhar/elastic-go,vsekhar/elastic-go,akutz/go,golang/go,ImJasonH/go,golang/go,cloudflare/go,Cofyc/go,derekmarcotte/go,linux-on-ibm-z/go,nawawi/go,golang/go,cloudflare/go,derekmarcotte/go,polyverse-security/go,vsekhar/elastic-go,nawawi/go,vsekhar/elastic-go,codestation/go,linux-on-ibm-z/go,Cofyc/go,akutz/go,ImJasonH/go,vsekhar/elastic-go,josharian/go,cloudflare/go,CAFxX/go,josharian/go,josharian/go,ImJasonH/go,Cofyc/go,Cofyc/go,josharian/go,derekmarcotte/go,CAFxX/go,linux-on-ibm-z/go,CAFxX/go,nawawi/go,polyverse-security/go,codestation/go,golang/go,nawawi/go,polyverse-security/go,Cofyc/go,golang/go,codestation/go,linux-on-ibm-z/go,CAFxX/go,derekmarcotte/go,josharian/go,vsekhar/elastic-go,ImJasonH/go,cloudflare/go,codestation/go,christopher-henderson/Go,cloudflare/go,akutz/go,codestation/go,josharian/go,cloudflare/go,polyverse-security/go,derekmarcotte/go,nawawi/go,akutz/go,polyverse-security/go,linux-on-ibm-z/go,akutz/go,linux-on-ibm-z/go,codestation/go,akutz/go,codestation/go,nawawi/go,derekmarcotte/go,josharian/go,golang/go,golang/go,ImJasonH/go,polyverse-security/go,cloudflare/go,ImJasonH/go,linux-on-ibm-z/go,cloudflare/go,akutz/go,Cofyc/go,CAFxX/go,derekmarcotte/go,Cofyc/go,CAFxX/go,ImJasonH/go,vsekhar/elastic-go,golang/go,Cofyc/go,akutz/go