New system default SOGoEncryptionKey

To be used to encrypt the passwords of remote Web calendars when
SOGoTrustProxyAuthentication is enabled.

SoObjects/SOGo/SOGoDefaults.plist

@@ -10,6 +10,8 @@
 
     SOGoZipPath = "/usr/bin/zip";
 
+    SOGoEncryptionKey = "MySOGoEncryptionKey";
+
     WOUseRelativeURLs = YES;
     WOMessageUseUTF8 = YES;
     WOParsersUseUTF8 = YES;

SoObjects/SOGo/SOGoSystemDefaults.h

@@ -43,6 +43,7 @@
 - (BOOL) debugLeaks;
 - (int) vmemLimit;
 - (BOOL) trustProxyAuthentication;
+- (NSString *) encryptionKey;
 - (BOOL) useRelativeURLs;
 
 - (BOOL) isWebAccessEnabled;

SoObjects/SOGo/SOGoSystemDefaults.m

@@ -349,6 +349,11 @@ _injectConfigurationFromFile (NSMutableDictionary *defaultsDict,
   return [self boolForKey: @"SOGoTrustProxyAuthentication"];
 }
 
+- (NSString *) encryptionKey;
+{
+  return [self stringForKey: @"SOGoEncryptionKey"];
+}
+
 - (BOOL) useRelativeURLs
 {
   return [self boolForKey: @"WOUseRelativeURLs"];