Update to version 3.4.9.

Pkgsrc changes:
* fix up the set of REPLACE_PYTHON settings to match
* remove patch which has been accepted upstream, adapt remaining patch
* install the newly contributed man pages
* adapt PLIST

Upstream changes:
3.4.9:
  This release mostly fixes a very embarrassing issue introduced with
  3.4.8 with non IPv4 unicast route decoding, the handlers were badly
  registered.

3.4.8:
  This is a bug fix release. It fixes an obscure bug when routes
  would not reach the backend API as two NLRI could be seen as
  identical due to a bad hashing of the attributes.

  * Fix: bug with multiple configuration files
  * Fix: allow generic attribute not only in single line but also
    in multiple lines patch by: Eiichiro Watanabe (issue #214)
  * Fix: issue with parsing extended-community origin reported by: Tim Preston
  * Fix: handle numeric community parsing correctly reported by: Aaron Kalin
  * Fix: bug in AS_PATH with AS_SET handling patch by: Eiichiro Watanabe
  * Fix: off by one for the maximum message size generation reported
    by: Eiichiro Watanabe
  * Fix: issue with handling of some generic attributes reported
    by: Hiroshi Yokoi
  * Fix: restore old api syntax broken by mistake patch by: David Waring
  * Fix: issue with E-VPN NLRI patch by: Thomas Morin
  * Fix: bad iteration for JSON generation ( bug created during
    3.4.8 dev ) patch by: Ian bobbitt
  * Fix: healthcheck.py: optionally match "alias" in ifconfig output
    patch by: Havard Eidnes
  * Fix: healthcheck.py: make the ifconfig path work; regexp fix
    patch by: Havard Eidnes
  * Change: moved the netlink library within exabgp
  * Feature: qa/bin/ip and qa/bin/route

(he)