EVP_EncryptInit(3) is among the most important "how to drive" manuals,

EVP_EncryptInit(3) is among the most important "how to drive" manuals,
but it is still excessively long and complicated.  To reduce the amount
of distractions a bit, split out three deprecated functions into a new
manual page EVP_CIPHER_CTX_init(3).  No text change.

In part suggested by tb@, who agrees with the direction.