lirc.service: Actually use sysconfig files (881976).
lirc.service: Don't fork, systemd handles non-forking processes.
lirc-spec: Use iguanaIR driver by default (#954146).
lirc.spec: Remove already fixed TODO for irman.
lirc.spec: Add hardened build flag (#955144).
lirc.spec: Use new-style systemd macros (850191).
lirc.spec: Remove some nowadays not used stuff.
lirc.spec: Run autoreconf by default (#926082).

As a consequence, remove some patching of the generated files.
lirc.spec: Reorganize requires: one per line, in order.
lirc.spec: Fix obsoleted autotools stuff.
lirc.service: Deactivate other decoders on start (923978).
lirc.spec, configure.ac:Use autoreconf to handle lirc->lirc0.
lirc.spec: Filter away docdir dependencies.
lirc.spec: Kill some long lines and a rpmlint warning.
lirc.spec: Remove obsolete F8 upgrade Obsoletes: (sic!).
lirc.spec: %post: ignore possible errors.
lirc.spec: Fix duplicate /usr/share/lirc, add docs.
lirc.spec,configure.ac: Update old autotools macros.
lirc.spec: Claim /etc/lirc.
lirc.spec: Use parallell make.