structures using HTTP. Add wrapper function to handle CRL download.

traditional format uses MD5 which is prohibited in FIPS mode.

the SSL_CONF APIs.

This is complicated a little because the SSL_CTX structure is not available
when the command line is processed: so just check syntax of commands initially
and store them, ready to apply later.

(backport from HEAD)

definitions from e_os.h

Give more meaningful error is attempt made to use incorrect curve.

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side, if possible.

Don't advertise compressed char2 for SuiteB as it is not supported.
(backport from HEAD)

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client hello message. Previously this could only be retrieved on an initial
connection and it was impossible to determine the cipher IDs of any uknown
ciphersuites.
(backport from HEAD)

new ctrl to retrive value of received temporary key in server key exchange message, print out details in s_client
(backport from HEAD)