Fix include guards to not start with _

Since such names are reserved, technically.

commands.hpp

@@ -28,8 +28,8 @@
  * as that of the covered work.
  */
 
-#ifndef _COMMANDS_H
-#define _COMMANDS_H
+#ifndef GIT_CRYPT_COMMANDS_HPP
+#define GIT_CRYPT_COMMANDS_HPP
 
 #include <string>
 

crypto.hpp

@@ -28,8 +28,8 @@
  * as that of the covered work.
  */
 
-#ifndef _CRYPTO_H
-#define _CRYPTO_H
+#ifndef GIT_CRYPT_CRYPTO_HPP
+#define GIT_CRYPT_CRYPTO_HPP
 
 #include "key.hpp"
 #include <openssl/aes.h>

git-crypt.hpp

@@ -28,8 +28,8 @@
  * as that of the covered work.
  */
 
-#ifndef _GIT_CRYPT_H
-#define _GIT_CRYPT_H
+#ifndef GIT_CRYPT_GIT_CRYPT_HPP
+#define GIT_CRYPT_GIT_CRYPT_HPP
 
 extern const char*	argv0;	// initialized in main() to argv[0]
 

gpg.hpp

@@ -28,8 +28,8 @@
  * as that of the covered work.
  */
 
-#ifndef _GPG_H
-#define _GPG_H
+#ifndef GIT_CRYPT_GPG_HPP
+#define GIT_CRYPT_GPG_HPP
 
 #include <string>
 #include <vector>

key.hpp

@@ -28,8 +28,8 @@
  * as that of the covered work.
  */
 
-#ifndef _KEY_H
-#define _KEY_H
+#ifndef GIT_CRYPT_KEY_HPP
+#define GIT_CRYPT_KEY_HPP
 
 #include <map>
 #include <functional>

util.hpp

@@ -28,8 +28,8 @@
  * as that of the covered work.
  */
 
-#ifndef _UTIL_H
-#define _UTIL_H
+#ifndef GIT_CRYPT_UTIL_HPP
+#define GIT_CRYPT_UTIL_HPP
 
 #include <string>
 #include <ios>