mod_debug_traceback: Remove direct POSIX signal handling, require Prosody 0.12+
Hooking an event is safer than directly hooking signals
For context see Prosody trunk rev 69faf3552d52
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summary: Cache caps on user sessions
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Description
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This module listens on presences containing caps (XEP-0115) and asks the client
for the corresponding disco#info if it changed.
It fires the c2s-capabilities-changed event once the disco#info result is
received.
Compatibility
=============
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trunk Works
0.11 Does not work
0.10 Does not work
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