Remove some documentation for functions not in 1.0.x

=head1 NAME

EVP_ENCODE_CTX_new, EVP_ENCODE_CTX_free, EVP_ENCODE_CTX_num, EVP_EncodeInit,

EVP_EncodeUpdate, EVP_EncodeFinal, EVP_EncodeBlock, EVP_DecodeInit,

EVP_DecodeUpdate, EVP_DecodeFinal, EVP_DecodeBlock - EVP base 64 encode/decode

routines

EVP_EncodeInit, EVP_EncodeUpdate, EVP_EncodeFinal, EVP_EncodeBlock,

EVP_DecodeInit, EVP_DecodeUpdate, EVP_DecodeFinal, EVP_DecodeBlock - EVP base 64

encode/decode routines

=head1 SYNOPSIS

 #include <openssl/evp.h>

 EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void);

 void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx);

 int EVP_ENCODE_CTX_num(EVP_ENCODE_CTX *ctx);

 void EVP_EncodeInit(EVP_ENCODE_CTX *ctx);

 void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,

                       const unsigned char *in, int inl);

multiple of 3 then the output data will be padded at the end using the "="

character.

EVP_ENCODE_CTX_new() allocates, initializes and returns a context to be used for

the encode/decode functions.

EVP_ENCODE_CTX_free() cleans up an encode/decode context B<ctx> and frees up the

space allocated to it.

Encoding of binary data is performed in blocks of 48 input bytes (or less for

the final block). For each 48 byte input block encoded 64 bytes of base 64 data

is output plus an additional newline character (i.e. 65 bytes in total). The

sufficiently large to accommodate the output data which will never be more than

65 bytes plus an additional NUL terminator (i.e. 66 bytes in total).

EVP_ENCODE_CTX_num() will return the number of as yet unprocessed bytes still to

be encoded or decoded that are pending in the B<ctx> object.

EVP_EncodeBlock() encodes a full block of input data in B<f> and of length

B<dlen> and stores it in B<t>. For every 3 bytes of input provided 4 bytes of

output data will be produced. If B<dlen> is not divisible by 3 then the block is

=head1 RETURN VALUES

EVP_ENCODE_CTX_new() returns a pointer to the newly allocated EVP_ENCODE_CTX

object or NULL on error.

EVP_ENCODE_CTX_num() returns the number of bytes pending encoding or decoding in

B<ctx>.

EVP_EncodeBlock() returns the number of bytes encoded excluding the NUL

terminator.