doc: Update rpki.rst for how-to enable rpki module

[netravnen]

It has not been properly documented yet how to enable the RPKI module with BGP when having installed FRR with RPKI support. This PR seeks to add a section to the user documentation about this. So users will not have to resolve to searching the internet and looking through the FROG mailing list threads for answers.

[netravnen]

Should be tagged with label documentation

[NetDEF-CI]

Continuous Integration Result: FAILED

See below for issues.
CI System Testrun URL: https://ci1.netdef.org/browse/FRR-FRRPULLREQ-4495/

This is a comment from an EXPERIMENTAL automated CI system.
For questions and feedback in regards to this CI system, please feel free to email
Martin Winter - mwinter (at) opensourcerouting.org.

Get source and apply patch from patchwork: Successful

Building Stage: Failed

CentOS6 amd64 build: Successful
Debian9 amd64 build: Successful
FreeBSD9 amd64 build: Successful
OmniOS amd64 build: Successful
Ubuntu1204 amd64 build: Successful
Ubuntu 16.04 i386: Successful
NetBSD6 amd64 build: Successful
CentOS7 amd64 build: Successful
Debian8 amd64 build: Successful
FreeBSD10 amd64 build: Successful
Ubuntu1404 amd64 build: Successful
NetBSD7 amd64 build: Successful
Fedora24 amd64 build: Successful
Ubuntu1604 amd64 build: Successful
Ubuntu 18.04 amd64 build: Successful
FreeBSD11 amd64 build: Successful

OpenBSD60 amd64 build: Failed

Make failed for OpenBSD60 amd64 build:
(see full make log at https://ci1.netdef.org/browse/FRR-FRRPULLREQ-4495/artifact/CI011BUILD/ErrorLog/log_make.txt)

   instead of the default setting
   bgpd_options="   --daemon -A 127.0.0.1"
   Else you will encounter an error when trying to enter RPKI configuration mode. Because
   the rpki module is not loaded when the BGP daemon is initialized.
   Examples of the error:
   router(config)# debug rpki
   % [BGP] Unknown command: debug rpki
   router(config)# rpki
   % [BGP] Unknown command: rpki

OpenBSD60 amd64 build: config.status output from configure script can be found at https://ci1.netdef.org/browse/FRR-FRRPULLREQ-4495/artifact/CI011BUILD/config.status/config.status

[LabN-CI]

💚 Basic BGPD CI results: SUCCESS, 0 tests failed

Results table

_	_
Result	SUCCESS git merge/2669 04a18e3
Date	07/17/2018
Start	12:50:10
Finish	13:13:11
Run-Time	23:01
Total	1816
Pass	1816
Fail	0
Valgrind-Errors	0
Valgrind-Loss	0
Details	vncregress-2018-07-17-12:50:10.txt
Log	autoscript-2018-07-17-12:50:54.log.bz2

For details, please contact louberger

[NetDEF-CI]

Continuous Integration Result: FAILED

See below for issues.
CI System Testrun URL: https://ci1.netdef.org/browse/FRR-FRRPULLREQ-4494/

This is a comment from an EXPERIMENTAL automated CI system.
For questions and feedback in regards to this CI system, please feel free to email
Martin Winter - mwinter (at) opensourcerouting.org.

Get source and apply patch from patchwork: Successful

Building Stage: Successful

Basic Tests: Failed

Topotest tests on Ubuntu 16.04 i386: Successful
Fedora 24 rpm pkg check: Successful
CentOS 7 rpm pkg check: Successful
Addresssanitizer topotest: Successful
Debian 8 deb pkg check: Successful
IPv4 protocols on Ubuntu 14.04: Successful
IPv4 ldp protocol on Ubuntu 16.04: Successful
Debian 9 deb pkg check: Successful
Ubuntu 14.04 deb pkg check: Successful
CentOS 6 rpm pkg check: Successful
Static analyzer (clang): Successful
IPv6 protocols on Ubuntu 14.04: Successful
Ubuntu 16.04 deb pkg check: Successful
Ubuntu 12.04 deb pkg check: Successful

Topology tests on Ubuntu 16.04 amd64: Failed

Topology tests on Ubuntu 16.04 amd64: Unknown Log <memleak_test_ldp_topo1.txt>
URL: https://ci1.netdef.org/browse/FRR-FRRPULLREQ-4494/artifact/TOPOU1604/MemoryLeaks/memleak_test_ldp_topo1.txt
Topology Test Results are at https://ci1.netdef.org/browse/FRR-FRRPULLREQ-TOPOU1604-4494/test

Topology Tests failed for Topology tests on Ubuntu 16.04 amd64:

r1: zebra crashed. Core file found - Backtrace follows:
[New LWP 10671]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/lib/frr/zebra'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007f716cb45428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#0  0x00007f716cb45428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x00007f716cb4702a in __GI_abort () at abort.c:89
#2  0x00007f716d55ceaa in core_handler (signo=7, siginfo=0x7ffe7d3d9d70, context=0x7ffe7d3d9c40) at lib/sigevent.c:247
#3  <signal handler called>
#4  0x00007f716cc0b74d in poll () at ../sysdeps/unix/syscall-template.S:84
#5  0x00007f716d569317 in poll (__timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#6  fd_poll (m=0x5572bf9775d0, m=0x5572bf9775d0, timer_wait=<optimized out>, count=<optimized out>, pfdsize=<optimized out>, pfds=<optimized out>) at lib/thread.c:766
#7  thread_fetch (m=m@entry=0x5572bf9775d0, fetch=fetch@entry=0x7ffe7d3da2f0) at lib/thread.c:1467
#8  0x00007f716d545023 in frr_run (master=0x5572bf9775d0) at lib/libfrr.c:913
#9  0x00005572bdbe36c4 in main (argc=1, argv=0x7ffe7d3da5d8) at zebra/main.c:394
2018-07-17 10:17:45,274 ERROR: assert failed at "test_ldp_topo1/test_shutdown_check_stderr": 
r1: zebra crashed. Core file found - Backtrace follows:
[New LWP 10671]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/lib/frr/zebra'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007f716cb45428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#0  0x00007f716cb45428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x00007f716cb4702a in __GI_abort () at abort.c:89
#2  0x00007f716d55ceaa in core_handler (signo=7, siginfo=0x7ffe7d3d9d70, context=0x7ffe7d3d9c40) at lib/sigevent.c:247
#3  <signal handler called>
#4  0x00007f716cc0b74d in poll () at ../sysdeps/unix/syscall-template.S:84
#5  0x00007f716d569317 in poll (__timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#6  fd_poll (m=0x5572bf9775d0, m=0x5572bf9775d0, timer_wait=<optimized out>, count=<optimized out>, pfdsize=<optimized out>, pfds=<optimized out>) at lib/thread.c:766
#7  thread_fetch (m=m@entry=0x5572bf9775d0, fetch=fetch@entry=0x7ffe7d3da2f0) at lib/thread.c:1467
#8  0x00007f716d545023 in frr_run (master=0x5572bf9775d0) at lib/libfrr.c:913
#9  0x00005572bdbe36c4 in main (argc=1, argv=0x7ffe7d3da5d8) at zebra/main.c:394

see full log at https://ci1.netdef.org/browse/FRR-FRRPULLREQ-4494/artifact/TOPOU1604/ErrorLog/log_topotests.txt

---

CLANG Static Analyzer Summary

• Github Pull Request 2669, comparing to Git base SHA 8f61e2b

No Changes in Static Analysis warnings compared to base

5 Static Analyzer issues remaining.

See details at
https://ci1.netdef.org/browse/FRR-FRRPULLREQ-4494/artifact/shared/static_analysis/index.html