+ Remove the signal pipe if no signal events are around
+ document tevent_req_create state zeroing
+ Fix Coverity ID 989236 Operands don't affect result
+ Add tevent tutorial files and link it on the mainpage
+ Only set poll_ev->delete=false if it was true
OBS-URL: https://build.opensuse.org/package/show/network:samba:STABLE/tevent?expand=0&rev=29
