add descriptions

[bhuffaker]

• catalog-data-caida/sources/dataset/asymmetry-test.md
• catalog-data-caida/sources/dataset/bdk.md
• catalog-data-caida/sources/dataset/bgp-hijacks-defcon-events.md
• catalog-data-caida/sources/dataset/bgp-hijacks-defcon-traceroutes.md
• catalog-data-caida/sources/dataset/bgp-hijacks-defcon.md
• catalog-data-caida/sources/dataset/bgp-hijacks-edges-events.md
• catalog-data-caida/sources/dataset/bgp-hijacks-edges-traceroutes.md
• catalog-data-caida/sources/dataset/bgp-hijacks-moas-events.md
• catalog-data-caida/sources/dataset/bgp-hijacks-moas-traceroutes.md
• catalog-data-caida/sources/dataset/bgp-hijacks-peer-pfx-origins.md
• catalog-data-caida/sources/dataset/bgp-hijacks-redis.md
• catalog-data-caida/sources/dataset/bgp-hijacks-routed-space.md
• catalog-data-caida/sources/dataset/bgp-hijacks-submoas-events.md
• catalog-data-caida/sources/dataset/bgp-hijacks-submoas-traceroutes.md
• catalog-data-caida/sources/dataset/bgp-hijacks-submoas.md
• catalog-data-caida/sources/dataset/bgp-hijacks-triplets-weekly.md
• catalog-data-caida/sources/dataset/caidaspy.md
• catalog-data-caida/sources/dataset/datcat-oracle-dump.md
• catalog-data-caida/sources/dataset/dren-xfr-segments.md
• catalog-data-caida/sources/dataset/dren-xfr.md
• catalog-data-caida/sources/dataset/gt-bgp.md
• catalog-data-caida/sources/dataset/hostip.md
• catalog-data-caida/sources/dataset/internetcensus2012.md
• catalog-data-caida/sources/dataset/isi-lander.md
• catalog-data-caida/sources/dataset/kleinberg-wikipedia.md
• catalog-data-caida/sources/dataset/netflow-sdsc.md
• catalog-data-caida/sources/dataset/stardust-dist.md
• catalog-data-caida/sources/dataset/stardust-spoki.md
• catalog-data-caida/sources/dataset/telescope-ascii-rsdos.md
• catalog-data-caida/sources/dataset/telescope-dos-crawler.md
• catalog-data-caida/sources/dataset/telescope-meritnt-influx.md
• catalog-data-caida/sources/dataset/telescope-pcap-live-encrypted.md
• catalog-data-caida/sources/dataset/telescope-pcap-staged-encrypted-segments.md
• catalog-data-caida/sources/dataset/telescope-pcap-staged-encrypted.md
• catalog-data-caida/sources/dataset/telescope-pcap-staged.md
• catalog-data-caida/sources/dataset/telescope-pcap-stats.md
• catalog-data-caida/sources/dataset/telescope-reactive-pcap-live.md
• catalog-data-caida/sources/dataset/telescope-reactive-pcap-stats.md
• catalog-data-caida/sources/dataset/telescope-rsdos-daily-intermediate.md
• catalog-data-caida/sources/dataset/timestamps.md
• catalog-data-caida/sources/dataset/wide.md
• catalog-data-caida/sources/media/2001_as_core_ipv4.json
• catalog-data-caida/sources/media/2020_dynamips_conext_video.json
• catalog-data-caida/sources/media/2020_unresolved_issues_imc_video.json
• catalog-data-caida/sources/media/2022_gmi3s_infosheet.json
• catalog-data-caida/sources/presentation/2005_mit_spoofer_project.json
• catalog-data-caida/sources/presentation/2009_spoofer_aims.json
• catalog-data-caida/sources/presentation/2009_spoofer_imc.json