server: Move all the top level files into cmd folder. (#2490)

This change brings a change which was done for the 'mc'
package to allow for clean repo and have a cleaner
github drop in experience.

cmd/typed-errors.go

@@ -0,0 +1,45 @@
+/*
+ * Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import "errors"
+
+// errCode represents the return status of shutdown functions
+type errCode int
+
+const (
+	exitFailure errCode = -1
+	exitSuccess errCode = 0
+)
+
+// errSyslogNotSupported - this message is only meaningful on windows
+var errSyslogNotSupported = errors.New("Syslog logger not supported on windows")
+
+// errInvalidArgument means that input argument is invalid.
+var errInvalidArgument = errors.New("Invalid arguments specified")
+
+// errSignatureMismatch means signature did not match.
+var errSignatureMismatch = errors.New("Signature does not match")
+
+// used when token used for authentication by the MinioBrowser has expired
+var errInvalidToken = errors.New("Invalid token")
+
+// If x-amz-content-sha256 header value mismatches with what we calculate.
+var errContentSHA256Mismatch = errors.New("sha256 mismatch")
+
+// used when we deal with data larger than expected
+var errSizeUnexpected = errors.New("data size larger than expected")