Function nginx::EVP_PKEY_meth_get_keygen

pub unsafe extern "C" fn EVP_PKEY_meth_get_keygen(
    pmeth: *mut EVP_PKEY_METHOD, 
    pkeygen_init: *mut Option<unsafe extern "C" fn(ctx: *mut EVP_PKEY_CTX) -> c_int>, 
    pkeygen: *mut Option<unsafe extern "C" fn(ctx: *mut EVP_PKEY_CTX, pkey: *mut EVP_PKEY) -> c_int>
)