[slf4j-dev] developer DCO sign off

[Ceki]

Hello all,

Instead of requiring a signed CLA, the SLF4J project contributions now 
require a DCO [1] sign off. This requirement is checked by Github's DCO 
sign off application [2].

Sign-off is accomplished by adding a -s switch during commit.
For example,

   git commit -s -m 'This is my commit message'

This add a Signed-off-by line to the commit which includes the 
committers full name and email address.

That's it.

[1] https://developercertificate.org/
[2] https://probot.github.io/apps/dco/

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Ceki Gülcü