Removing redundant block.Type check (#7)

Also creating 2016-dated, jsha-owned MIT license (from github templates)

LICENSE.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2016 Jacob Hoffman-Andrews
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

main.go

@@ -81,7 +81,7 @@ func readCert(certContents []byte) (*x509.Certificate, error) {
 	block, _ := pem.Decode(certContents)
 	if block == nil {
 		return nil, fmt.Errorf("no PEM found")
-	} else if block.Type != "CERTIFICATE" && block.Type != "CERTIFICATE" {
+	} else if block.Type != "CERTIFICATE" {
 		return nil, fmt.Errorf("incorrect PEM type %s", block.Type)
 	}
 	return x509.ParseCertificate(block.Bytes)