Is there a tutorial on how to sign off on someone's patch on the wiki
or elsewhere? If not, can someone write one since this is the new
process we want to try and follow for all 3.4 patches

• You apply someone patch to your local repo.
• You test it.
• If the patch is ok, you prepare a new one for it (git format-patch -s). -s = signoff
  
• Send the new patch as usual.