missing CRs and modified %hostip
lib556/test556: use a real HTTP version to make test reuse more convenient
make sure the weekday in Date headers matches the date
test61: replace stray "^M" (5e 4d) at the end of a cookie with a '^M' (0d)
Gets the test working with external proxies like Privoxy again.
Closes#6463
The code is more or less copied from the stdout comparison code, maybe
some better reuse is possible.
test 1457 is adjusted to make the output actually match (by using --silent)
test 506 used <stderr> without actually needing it, so that <stderr> block is removed
Closes#3536
