Fail to encode IPv6 address

[jianiau]

If the IPv6 address use IPv4-mapped IPv6 address: ::ffff:a.b.c.d/96
for example: ::ffff:1.2.3.4

It will get syntax error
3:syntax error token .2.3.4
Error parsing config file ddd

Test step:

1. encode text file to cm ocnfig (::FFFF:102:304 = ::FFFF:1.2.3.3)
   Main
   {
   SwUpgradeServer6 ::FFFF:102:304 ;
   }

The output is
Main
{
SwUpgradeServer6 ::ffff:1.2.3.4;
/* CmMic 3510888c30355a1f3b4211cae90c99b1; /
/ CmtsMic 16ea3fa0d43e1a0914f4ca77061c6770; */
/EndOfDataMkr/
}

2. Use the output text (or decode the output file to text) to encode again. The error will happen.

[rlaager]

Just to set expectations correctly, this project is not getting much active maintenance. Patches are certainly welcome.