server.lua: Use Prosody logger for errors, silence non-errors

Port to new server.lua, quite some changes, but I believe everything to be working

net.http: custom_headers -> headers

net.http: Remove request from conn->request table when conn closed

mod_console: Make global

mod_posix: logging fix

Fix for pposix version detection

(0) -300 -100 -30 -10 -7 +7 +10 +30 +100 +300 +1000 +3000 tip

mercurial