encryption/decryption of distant messages. Moved initialisation of services after GXS components in rsinit.cc. Slightly changed prototype of GxsSecurity::{en,de}crypt() to be consistent with the other methods of that class

git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.6-IdCleaning@7193 b45a01b8-16f6-495d-af2f-9b41ad6348cc