common: Remove homedir arg from start_new_{dirmngr,gpg_agent}.
* common/asshelp.c (start_new_gpg_agent): Remove arg 'homedir' in favor of gnupg_homedir (). Change all callers. (start_new_dirmngr): Ditto. * common/get-passphrase.c (gnupg_prepare_get_passphrase): Remove arg 'homedir'.
- Signed-off-by: Werner Koch <wk@gnupg.org>