docs: Update bgpd docs, inc. on decision process, and with a section on MED.
* bgpd.texi: Document the -l argument. Update the 'BGP decision process' table
to reflect what /actually/ is implemented. Add docs on 'compare-routerid' in
the bestpath section.
Add a section on MED, to highlight the issues it has by default, and to
highlight that it is terminally broken for its original purpose in many
modern iBGP topologies.
Mention the potential workarounds and fixes.
* routemap.texi: set an anchor on 'set metric' so bgpd.texi can reference it.
2 files changed