Log Message:
Update to 0.99.24.1.

Remove patches that were applied upstream.
isisd is enabled, but pimd isn't yet (only because those are upstream defaults).

Upstream changes since 0.99.23:

User-visible changes:
- [pimd] New daemon: pimd provides IPv4 PIM-SSM multicast routing.
- [bgpd] New feature: "next-hop-self all" to override nexthop on iBGP route
    reflector setups.
- [bgpd] route-maps have a new action "set ipv6 next-hop peer-address"
- [bgpd] route-maps have a new action "set as-path prepend last-as"
- [bgpd] Update validity checking (particularly MP-BGP / IPv6 routes) was
    touched up significantly.  Please report possible bugs.
- [ripd] New feature: RIP for IPv4 now supports equal-cost multipath (ECMP)
- [zebra] Multicast RIB support has been extended.  It still is IPv4 only.
- [zebra] "no link-detect" is now printed in configurations since it won't
    be the default anymore soon.  To retain current behaviour, re-save your
    configuration after updating to 0.99.24.

Distributor-visible changes:
- --enable-pimd is added to enable pimd.  It is considered experimental, though
    unless the distribution target is embedded systems with little flash, there
    is no reason to not include it in packages.
- --disable-ipv6 no longer exists as an option.  It's 2015, your C library
    really needs to have IPv6 support by now.
- --disable-netlink no longer exists as an option.  It didn't work anyway.
- --disable-solaris no longer exists as an option.  It only controlled some
    init scripts.
- --enable-isisd is now the default.
- mrlg.cgi is no longer included (it was severely outdated).  It can be found
    independently at http://mrlg.op-sec.us/
- build on Linux with the musl C library should now work