layout.conf: Specify settings for manifest/commit signing, manifest contents and deprecated EAPIs
This MR adds the following contents to repos.conf:
- deprecate EAPIs 0..6
- disable Manifest signing
- enable checksums in Manifest only for distfiles (everything else is already secured by using git)
- enable commit signing
Possible improvements:
- ban EAPIs 0..5 and deprecate only EAPI 6
Signed-off-by: Adrian 'nex' Schollmeyer adrian.schollmeyer@fem.tu-ilmenau.de