[core] Fixed seqno validity check by group receiver (Haivision#2142)

[core] Fix Solaris build. (Haivision#2115)

[build] Bump version to 1.4.4

[core] New API function srt_clock_type() (Haivision#1887)

[core] Check invalid sockopt values (Haivision#1956)

* SRTO_CONNTIMEO: reject negative
* SRTO_PAYLOADSIZE: reject negative and fix FEC
* SRTO_SNDDROPDELAY >= -1
* SRTO_SNDTIMEO >= -1
* SRTO_*LATENCY >= 0
* SRTO_PEERIDLETIMEO >= 0
* SRTO_RCVTIMEO >= -1

[build] Bump version to 1.4.3

[core] Fixed incorrectly updated default GROUPSTABTIMEO (Haivision#1576)

[build] Fix build on GNU/Hurd

Bump version to 1.4.0

Bump version to 1.3.4