scripter: add udp send of multiple strings

[h0nIg]

Description:

@gemu2015

udp(2 ..) supports sending multiple strings, in case of heavy string size
udp(7 ..) does not support sending string arrays (or i was not able to get it working)

udp(8 url port s1 (s2) (s3)) supports sending with the same schema like udp(2 ..)

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.11 / V.3.3.8
• I accept the CLA.

[Jason2866]

@gemu2015 could you review? thx!

[gemu2015]

can be merged