Add command to print merged configuration

[ZoltanFridrich]

Add an option to dump merged configuration to standard output. Currently its a draft which uses test configs as an input.

Closes #395

Signed-off-by: Zoltan Fridrich [email protected]

[coveralls]

Coverage decreased (-0.07%) to 71.27% when pulling 5facf24 on ZoltanFridrich:zfridric_devel2 into 5056a43 on p11-glue:master.

[ZoltanFridrich]

@ueno is the output format ok?
Current demo output looks like this:

$p11-kit print-config
p11-kit: invalid config filename, will be ignored in the future: /home/zfridric/upstream/p11-kit/p11-kit/fixtures/system-modules/two.badname
[global]
key3 = user3
key2 = user2
key1 = system1
user-config = merge
[two.badname]
setting = system2
module = mock-two.so
[six]
priority = 100
enable-in = test-proxy
module = mock-six.so
[four]
priority = 4
disable-in = test-disable, test-other
trust-policy = no
module = mock-four.so
[seven]
critical = yes
enable-in = test-modules
module = mock-seven.so
[two-duplicate]
module = mock-two.so
[one]
managed = yes
number = 33
setting = user1
trust-policy = yes
module = mock-one.so
[three]
priority = 3
setting = user3
enable-in = test-enable
module = mock-three.so

[ueno]

@ueno is the output format ok?

Looks good to me as the default (human readable) output. Eventually, we could support a structured format (e.g., JSON, TOML, etc.) with schema validation, that could be through a new option, e.g., --format=json.

[ueno]

Thanks!