Você tentou rfcutil?
Eu mesmo não o usei, mas é o que meu gerenciador de pacotes afirma:
* app-text/rfcutil
Available versions: 3.2.3 (~)3.2.3-r1
Homepage: http://www.dewn.com/rfc/
Description: return all related RFCs based upon a number or a search string
Atualização: sim, funciona muito bem.
valentha qdot # rfc -i
Modem users one moment, it's about 1024k (doesn't need to be updated often)
original lines = 0 /var/cache/rfc/rfc-index
new lines = 25078 /var/cache/rfc/rfc-index
valentha qdot # rfc -s Avian
The Result:
1149 Standard for the transmission of IP datagrams on avian carriers.
D. Waitzman. April 1 1990. (Format: TXT=3329 bytes) (Updated by
RFC2549) (Status: EXPERIMENTAL)
2549 IP over Avian Carriers with Quality of Service. D. Waitzman.
April 1 1999. (Format: TXT=9519 bytes) (Updates RFC1149) (Status:
INFORMATIONAL)