Firmware SW00294-3.7.6.0

Supported Products:
- Z-TWS4, Z-TWS4-1 
- Z-PASS2-S, Z-PASS2-S-1
- Z-PASS2-S-IO, Z-PASS2-S-IO-4G
- Z-PASS2-S-4GW
- S6001-RTU


NEW FEATURES
- New IEC60870-5-101/104 Master/Client stack [PLCSTRATON-54].
- Database Update for Automatic APN Selection [PLCSTRATON-62]
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FIX ANOMALIES
- fix report control block protocol IEC61850 "write failed" [PLCSTRATON-60]
- fix firmware upgrade in case of reload of the web page that shows the message "Upgrading firmware, this will take some time" [PLCSTRATON-60]
- fix automatic APN selection in case of failed search attempts based on SPN/GID/IMSI
- fix SMS reception with "carriage return" character that is not detected by FB GET_SMS [PLCSTRATON-69].