(from AES) Merge pull request #2127 from datawire/flynn/dev/64KiB
(from AES) Merge pull request #2127 from datawire/flynn/dev/64KiB

Do the right thing when loading URL contents that exceed 64KiB
datawire/ambassador,datawire/ambassador,datawire/ambassador,datawire/ambassador,datawire/ambassador