config-defuns.el (dmd/autocompile): Load compiled file when autocompiling

* config-defuns.el (dmd/autocompile): Load the .elc instead of the .el
when autocompiling.
Add a customized `rename-buffer'

* config-defuns.el (dmd/rename-buffer): Add my own version of
`rename-buffer' which propose the current buffer name as initial value.

* config-alias.el: Update alias definition to use my new `rename-buffer'.
elisp/graze-url.el: Support multiple (more than 2) browse-url functions

* elisp/graze-url.el (gu-browse-url-functions): Replace
`gu-second-browse-url-function' and `gu-first-browse-url-function' by a
list of functions stored in `gu-browse-url-functions'.
(gu-get-browse-url-function): Compute the browse-url function to be used
according to the prefix key value.