ciphersuite selection code in HEAD

Submitted by: Victor Duchovni

This change resolves a number of problems and obviates multiple kludges.
A new feature is that you can now say "AES256" or "AES128" (not just
"AES", which enables both).

In some cases the ciphersuite list generated from a given string is
affected by this change.  I hope this is just in those cases where the
previous behaviour did not make sense.

pointer and make the SSL_METHOD parameter in SSL_CTX_new,
SSL_CTX_set_ssl_version and SSL_set_ssl_method const.

for locking code. The CRYPTO_LOCK_SSL_METHOD lock is now no longer used.

    	./configure no-deprecated [no-dsa] [no-dh] [no-ec] [no-rsa]
    	make depend all test
work again

PR: 1159

handshake_write_seq is an unsigned short, so treat it like one

move some functions from exported header <openssl/dtl1.h> into "ssl_locl.h";
fix silly indentation (a TAB is *not* always 4 spaces)