* configure.ac: Remove option --build-agent-only.
(FAKE_CURL, GPGKEYS_CURL): Remove check for cURL
(GPGKEYS_MAILTO): Remove ac_subst but keep the currently unused
SENDMAIL check.
(GPGKEYS_KDNS): Remove ac_subst.
* autogen.rc (final_info): Remove suggestion to use the removed option
--enable-mailto.
* autogen.sh: Add option --find-version
* configure.ac: Rework the setting of the mym4_ variables.
--
The old system was not too well defined if no release for a series has
yet been done. We now introduce a "PACKAGE-N.M-base" tag to solve
this problem. To keep the M4 code readable the GIT parsing has been
moved to ./autogen.sh.
