docbook-utils-0.6.14-160000.2.2

- Use %patch -P N instead of deprecated %patchN.

- fix the download URL

- Add support_source_date_epoch.patch to allow for reproducible builds
  of depending packages like freerdp

- fix bashisms of jw script
- add patches:
  * docbook-utils-0.6.14-fix-bashisms.patch

- split out the backends that do not require tex to work

- add automake as buildrequire to avoid implicit dependency

- Remove redundant tags/sections from specfile
  (cf. packaging guidelines)
- Use %_smp_mflags for parallel build

- enable parallel build

- Use texlive-jadetex instead of jadetex

- converted neededforbuild to BuildRequires