babeld: Remove babeld from Quagga

This commit removes babeld from Quagga because the Quagga project is unable
to meet the wishes of the babeld authors.
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 11eca73..3ff3170 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -46,7 +46,7 @@
 quagga.pdf: $(info_TEXINFOS) $(figures_pdf) $(quagga_TEXINFOS)
 	$(TEXI2PDF) -o "$@" $< || true
 
-quagga_TEXINFOS = appendix.texi babeld.texi basic.texi bgpd.texi filter.texi \
+quagga_TEXINFOS = appendix.texi basic.texi bgpd.texi filter.texi \
 	install.texi ipv6.texi kernel.texi main.texi ospf6d.texi ospfd.texi \
 	overview.texi protocol.texi ripd.texi ripngd.texi routemap.texi \
 	snmp.texi vtysh.texi routeserver.texi defines.texi $(figures_png) \
diff --git a/doc/babeld.texi b/doc/babeld.texi
deleted file mode 100644
index 1f24edd..0000000
--- a/doc/babeld.texi
+++ /dev/null
@@ -1,118 +0,0 @@
-@c -*-texinfo-*-
-@c This is part of the Quagga Manual.
-@c @value{COPYRIGHT_STR}
-@c See file quagga.texi for copying conditions.
-@node Babel
-@chapter Babel
-
-Babel is an interior gateway protocol that is suitable both for wired
-networks and for wireless mesh networks.  Babel has been described as
-``RIP on speed'' --- it is based on the same principles as RIP, but
-includes a number of refinements that make it react much faster to
-topology changes without ever counting to infinity, and allow it to
-perform reliable link quality estimation on wireless links.  Babel is
-a double-stack routing protocol, meaning that a single Babel instance
-is able to perform routing for both IPv4 and IPv6.
-
-Quagga implements Babel as described in RFC6126.
-
-@menu
-* Configuring babeld::          
-* Babel configuration::         
-* Babel redistribution::        
-* Show Babel information::      
-* Babel debugging commands::    
-@end menu
-
-@node Configuring babeld, Babel configuration, Babel, Babel
-@section Configuring babeld
-
-The @command{babeld} daemon can be invoked with any of the common
-options (@pxref{Common Invocation Options}).
-
-The @command{zebra} daemon must be running before @command{babeld} is
-invoked. Also, if @command{zebra} is restarted then @command{babeld}
-must be too.
-
-Configuration of @command{babeld} is done in its configuration file
-@file{babeld.conf}.
-
-@node Babel configuration, Babel redistribution, Configuring babeld, Babel
-@section Babel configuration
-
-@deffn Command {router babel} {}
-@deffnx Command {no router babel} {}
-Enable or disable Babel routing.
-@end deffn
-
-@deffn {Babel Command} {network @var{ifname}} {}
-@deffnx {Babel Command} {no network @var{ifname}} {}
-Enable or disable Babel on the given interface.
-@end deffn
-
-@deffn {Interface Command} {babel wired} {}
-@deffnx {Interface Command} {babel wireless} {}
-Specifies whether this interface is wireless, which disables a number
-of optimisations that are only correct on wired interfaces.
-Specifying @code{wireless} (the default) is always correct, but may
-cause slower convergence and extra routing traffic.
-@end deffn
-
-@deffn {Interface Command} {babel split-horizon}
-@deffnx {Interface Command} {no babel split-horizon}
-Specifies whether to perform split-horizon on the interface.
-Specifying @code{no babel split-horizon} (the default) is always
-correct, while @code{babel split-horizon} is an optimisation that
-should only be used on symmetric and transitive (wired) networks.
-@end deffn
-
-@deffn {Interface Command} {babel hello-interval <20-655340>}
-Specifies the time in milliseconds between two scheduled hellos.  On
-wired links, Babel notices a link failure within two hello intervals;
-on wireless links, the link quality value is reestimated at every
-hello interval.  The default is 4000@dmn{ms}.
-@end deffn
-
-@deffn {Interface Command} {babel update-interval <20-655340>}
-Specifies the time in milliseconds between two scheduled updates.
-Since Babel makes extensive use of triggered updates, this can be set
-to fairly high values on links with little packet loss.  The default
-is 20000@dmn{ms}.
-@end deffn
-
-@deffn {Babel Command} {babel resend-delay <20-655340>}
-Specifies the time in milliseconds after which an ``important''
-request or update will be resent.  The default is 2000@dmn{ms}.  You
-probably don't want to tweak this value.
-@end deffn
-
-@node Babel redistribution, Show Babel information, Babel configuration, Babel
-@section Babel redistribution
-
-@deffn {Babel command} {redistribute @var{kind}}
-@deffnx {Babel command} {no redistribute @var{kind}}
-Specify which kind of routes should be redistributed into Babel.
-@end deffn
-
-@node Show Babel information, Babel debugging commands, Babel redistribution, Babel
-@section Show Babel information
-
-@deffn {Command} {show babel database} {}
-@deffnx {Command} {show babel interface} {}
-@deffnx {Command} {show babel neighbour} {}
-@deffnx {Command} {show babel parameters} {}
-These commands dump various parts of @command{babeld}'s internal
-state.  They are mostly useful for troubleshooting.
-@end deffn
-
-@node Babel debugging commands,  , Show Babel information, Babel
-@section Babel debugging commands
-
-@deffn {Babel Command} {debug babel @var{kind}} {}
-@deffnx {Babel Command} {no debug babel @var{kind}} {}
-Enable or disable debugging messages of a given kind.  @var{kind} can
-be one of @samp{common}, @samp{kernel}, @samp{filter}, @samp{timeout},
-@samp{interface}, @samp{route} or @samp{all}.  Note that if you have
-compiled with the NO_DEBUG flag, then these commands aren't available.
-@end deffn
-
diff --git a/doc/ipv6.texi b/doc/ipv6.texi
index 2482c1c..5be2bab 100644
--- a/doc/ipv6.texi
+++ b/doc/ipv6.texi
@@ -2,7 +2,7 @@
 @chapter IPv6 Support
 
 Quagga fully supports IPv6 routing.  As described so far, Quagga supports
-RIPng, OSPFv3, Babel and BGP-4+.  You can give IPv6 addresses to an interface
+RIPng, OSPFv3, and BGP-4+.  You can give IPv6 addresses to an interface
 and configure static IPv6 routing information.  Quagga IPv6 also provides
 automatic address configuration via a feature called @code{address
 auto configuration}.  To do it, the router must send router advertisement
diff --git a/doc/quagga.texi b/doc/quagga.texi
index 8365071..6508962 100644
--- a/doc/quagga.texi
+++ b/doc/quagga.texi
@@ -85,7 +85,6 @@
 * RIPng::
 * OSPFv2::
 * OSPFv3::
-* Babel::
 * BGP::
 * Configuring Quagga as a Route Server::
 * VTY shell::
@@ -110,7 +109,6 @@
 @include ripngd.texi
 @include ospfd.texi
 @include ospf6d.texi
-@include babeld.texi
 @include bgpd.texi
 @include routeserver.texi
 @include vtysh.texi