staticcheck.conf: turn off noisy lint errors

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>

staticcheck.conf

@@ -0,0 +1,17 @@
+# Full list: https://staticcheck.io/docs/checks
+checks = [
+	"SA*", "-SA1019", "-SA2001", # SA* are mostly legit code errors
+
+	# S1?? are "code simplifications" which we consider unnecessary
+
+	# ST1??? are stylistic issues, some of which are generally accepted
+	# In general, if it's listed in
+	# https://github.com/golang/go/wiki/CodeReviewComments, then it
+	# may be an acceptable check.
+
+	# TODO(crawshaw): enable when we have docs? "ST1000", # missing package docs
+	"ST1001", # discourage dot imports
+
+	"QF1004", # Use `strings.ReplaceAll` instead of `strings.Replace` with `n == 1`
+	"QF1006", # Lift if+break into loop condition
+]