Don't mention the same object in IRC more than once every 10 minutes
Summary:
phabot gets spammy when discussing a specific revision.
Test Plan:
Added debugging code and produced a reasonable-looking chatlog:
[1:15pm] phabotlocal joined the chat room. [1:15pm] epriestley: D5 [1:15pm] phabotlocal: D5 quack - http://local.aphront.com/D5 [1:15pm] epriestley: D5 [1:15pm] phabotlocal: Declining to mention PHID-DREV-d7940d0fe081e3ae5267
again (59s left).
[1:15pm] epriestley: D5 [1:15pm] phabotlocal: Declining to mention PHID-DREV-d7940d0fe081e3ae5267
again (57s left).
[1:15pm] CodeBlock: nice :D [1:15pm] epriestley: I should just leave that code in for maximum irony. [1:15pm] epriestley: D5 [1:15pm] phabotlocal: Declining to mention PHID-DREV-d7940d0fe081e3ae5267
again (9s left).
[1:16pm] epriestley: D5 [1:16pm] phabotlocal: Declining to mention PHID-DREV-d7940d0fe081e3ae5267
again (2s left).
[1:16pm] epriestley: D5 [1:16pm] phabotlocal: D5 quack - http://local.aphront.com/D5 [1:16pm] epriestley: D5 [1:16pm] phabotlocal: Declining to mention PHID-DREV-d7940d0fe081e3ae5267
again (57s left).
[1:16pm] epriestley: rJUI100 [1:16pm] phabotlocal: http://local.aphront.com/rJUI100 [1:16pm] epriestley: rJUI100 [1:16pm] phabotlocal: Declining to mention PHID-CMIT-8fb731b171a27b8d477c
again (55s left).
[1:16pm] phabotlocal left the chat room. (Remote host closed the connection)
Reviewed By: aran
Reviewers: aran, codeblock, hsb, mroch
CC: aran
Differential Revision: 420