[MAINT] Added non-blocking option for bonding examples

[ethouris]

This adds a possibility of using non-blocking mode in bonding examples, when last argument is n.

[maxsharabayko]

Examples are now looking very complicated to read.
Consider moving some logic to a dedicated function like ConnectCaller(..), SendDummyPayload(..) or similar.

[nobodyintheworld]

in https://github.com/Haivision/srt/blob/master/examples/example-client-nonblock.c
srt_setsockflag(ss, SRTO_RCVSYN, &yes, sizeof yes)
here yes is 1 (according to doc api, this is blocking mode ) why the file name is "client-nonblock.c" ??

[maxsharabayko]

@nobodyintheworld It was a mistake. Thanks for finding and reporting!