[Go] string pattern matching libraries

zoekt: https://github.com/google/zoekt (design doc: https://github.com/google/zoekt/blob/master/doc/design.md)

rsc's codesearch: https://github.com/google/codesearch

bleve: https://github.com/blevesearch/bleve
Ferret: https://github.com/argusdusty/Ferret
trigram index search: https://github.com/dgryski/go-trigram
std library: https://golang.org/pkg/index/suffixarray/

String matching algorithms:
http://www-igm.univ-mlv.fr/~lecroq/string/