html/template: escape JS in application/json script tag
Since
ffd1c781b77aab542713b66ef387fa9307e4060b HTML templates check
MIME type in the "type" attribute of "script" tag to decide if contents
should be escaped as JavaScript. The whitelist of MIME types did not
include application/json. Include it in this CL.
Fixes #18159
Change-Id: I17a8a38f2b7789b4b7e941d14279de222eaf2b6a
Reviewed-on: https://go-review.googlesource.com/33899
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>