Lime proto babeld fixes

[altergui]

right now, babeld doesn't route between clouds over ipv6, since main_ipv6_address is set to fd%N1:%N2%N3:%N4%N5::/64

also, conceptually it makes total sense to redistribute fc00::/7 the same way 10.0.0.0/8 is redistributed

[codecov-io]

Codecov Report

Merging #830 (7f830d5) into master (19cc376) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #830      +/-   ##
==========================================
+ Coverage   72.27%   72.30%   +0.03%     
==========================================
  Files          37       37              
  Lines        3293     3297       +4     
==========================================
+ Hits         2380     2384       +4     
  Misses        913      913              

Impacted Files	Coverage Δ
...oto-babeld/files/usr/lib/lua/lime/proto/babeld.lua	95.89% <100.00%> (+0.23%)	⬆️

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