.gitignore: add Go-FTW configuration file
.gitignore: add Go-FTW configuration file

For information about Go-FTW, see https://github.com/fzipi/go-ftw

coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset