Bug 4330: Do not use SSL_METHOD::put_cipher_by_char to determine size

Bug 4330: Do not use SSL_METHOD::put_cipher_by_char to determine size

 ... of cipher on hello messages

The use of these methods can cause many problems in squid:
- In earlier openSSL libraries the SSL_METHOD::put_cipher_by_char method with
  NULL arguments returned the size of cipher in the SSL hello message.
  In newer openSSL releases, calling this method with NULL arguments is not
  valid any more, and can result to segfaults.
- In newer libreSSL library releases, the SSLv23_method it is used to produce
  TLS messages and does not return the size of a cipher in an v2 HELLO
  message.

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