update sign-file to use generic engine code

This patch does both built in engines and explicitly specified ones as per the discussion we had on the "support other engines" patch.

I think this should satisfy everyone's use case without requiring any change to the current work flow (or even options people use to build and sign modules).

James

---

James Bottomley (4):
sign-file: stop referring to the code as main.c
sign-file: remove open coding of ERR_clear_error()
sign-file: add generic built-in engine key support
sign-file: add explicit engine specification

 scripts/sign-file.c | 90 ++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 62 insertions(+), 28 deletions(-)

2.16.4