net/http: TLS handshake failure when session resumption is attempted

[bgilmore]

TLS session resumption by net/http Transport was broken by 3cf15b5

Example program: http://play.golang.org/p/yNVJaXwaxM

go version go1.4.2 linux/amd64:

<no output>

go version devel +3cfc34a Tue Aug 4 21:10:58 2015 +0000 linux/amd64

Died on iteration 2: Get https://www.google.com/: tls: handshake did not verify certificate chain
exit status 1

[ianlancetaylor]

CC @bradfitz

[bgilmore]

Sent https://go-review.googlesource.com/13145, but I'm still working on a reasonable test.

[gopherbot]

CL https://golang.org/cl/13164 mentions this issue.