[3DS] Content header magic doesn't always start with 0x80

[DaniElectra]

Most BOSS data (usually game data) starts with 0x80 as the CONTENT_HEADER_MAGIC. However, this isn't always the case.

There are some BOSS files (usually game config and news) that starts with 0x00, instead of 0x80. It is unknown how this value affects the BOSS data though

[DaniElectra]

I have done more research on this and I think that value is a flag related with marking the content as arrived or not. If the flag is not set, the sysmodule checks if the BOSS content was downloaded by a privileged session (BOSSP:InitializeSessionPrivileged was previously used for the belonging title). If that is the case, it marks the "arrived" flag in the application entry in the BOSS savedata.

If the flag is set though, this check is skipped, and always marks the "arrived" flag.