[webkit-dev] Update commit log template to make GNU changelog optional

[Michael Catanzaro]

Hi,

I'd like to remove the GNU changelog from the bottom of the commit 
messages by default. With "by default" I mean people who prefer to use 
the GNU changelog for formatting their commit messages would have to 
change git-webkit configuration to keep using it, and it would go away 
for everyone else's commit messages. I don't see any reason to prohibit 
the changelogs if really desired, but these were designed for an era 
before version control existed, to explain what is being changed rather 
than why. The freeform commit message that we add above the changelogs 
is usually a better way to explain commits.

(Another disadvantage is it is really easy for the changelog to become 
stale by mistake. When amending commits, you have to look closely at 
the bottom of the commit message template prepared by git-webkit to 
notice the updated changelog, then manually replace the original commit 
message's changelog. I'm sure we commit inaccurate changelogs all the 
time because we forget to do this.)

Michael