Updated docs/scripts

  * tex-stuff.org: updated file (syntax) and TL rsync address;
  * (TOP)/texlive-rsync-servers: updated;
  * (TOP)/bin: context-suite-update, texgrep, texlive-trunk-rsync,
      texlive-update, texls, texview: updated;
  * okular/part.rc: small update.

Signed-off-by: Vladimir Lomov <lomov.vl@gmail.com>