Function nginx::EVP_PKEY_CTX_ctrl

pub unsafe extern "C" fn EVP_PKEY_CTX_ctrl(
    ctx: *mut EVP_PKEY_CTX, 
    keytype: c_int, 
    optype: c_int, 
    cmd: c_int, 
    p1: c_int, 
    p2: *mut c_void
) -> c_int