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   On the server the repositories under /srv/git were owned david:david (me).
However, after the git change, git refused to serve over https unless the
directories under /srv/git were owned by http.

   Fine, change made - but now repos cloned read/write over ssh fail because
the directory under /srv/git is no longer owned by me.

   How do you make git repositories hosted on my local server allow clone/pull
over https AND allow me to still close read/write over ssh?

[...]

unless /srv/git/xxx.git is http:http, https fails

unless /srv/git/xxx.git is david:http, ssh fails