Fix go-get, src and raw urls to new scheme

[lafriks]

Fixes #2976

[ethantkoenig]

LGTM

[codecov-io]

Codecov Report

Merging #2978 into master will decrease coverage by <.01%.
The diff coverage is 26.66%.

@@            Coverage Diff             @@
##           master    #2978      +/-   ##
==========================================
- Coverage   32.53%   32.52%   -0.01%     
==========================================
  Files         267      267              
  Lines       39270    39270              
==========================================
- Hits        12776    12773       -3     
- Misses      24700    24710      +10     
+ Partials     1794     1787       -7

Impacted Files	Coverage Δ
modules/context/context.go	48.97% <0%> (ø)	⬆️
modules/context/repo.go	59.92% <0%> (ø)	⬆️
routers/repo/commit.go	16.26% <0%> (ø)	⬆️
routers/repo/search.go	54.16% <100%> (ø)	⬆️
routers/repo/pull.go	34.26% <50%> (ø)	⬆️
models/repo_indexer.go	49% <0%> (-2.98%)	⬇️
modules/indexer/repo.go	60.86% <0%> (-2.61%)	⬇️
models/repo.go	38% <0%> (+0.18%)	⬆️
modules/process/manager.go	81.15% <0%> (+4.34%)	⬆️

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[lunny]

LGTM