load_csr_autofmt
req = load_csr_autofmt(infile, informat, vfyopts, "certificate request");
csr = load_csr_autofmt(opt_csr, FORMAT_UNDEF, NULL, "PKCS#10 CSR");
X509_REQ *load_csr_autofmt(const char *infile, int format,
req = load_csr_autofmt(infile /* if NULL, reads from stdin */,
req = load_csr_autofmt(infile, informat, vfyopts,