new flag: --connect-to

Allows user to override DNS for the initial config request. This is
accomplished using a custom DialContext overring the hostname used to
Dial to. This allows for TLS certificate validation to still
happen(optionally) while connecting to TLS secured resources.

Also,
    - allows for optional enforcement of certificate verification
    - stamp built git version into binary and adds a --version option
    - adds a user-agent to all outgoing request
    - exit(1) on failures for easier shell error detection

1 files changed, 9 insertions, 3 deletions

diff --git a/utilities/utilities.go b/utilities/utilities.go
index 57b4a90..377be56 100644
--- a/utilities/utilities.go
+++ b/utilities/utilities.go
@@ -28,6 +28,11 @@ import (
 	"golang.org/x/exp/constraints"
 )
 
+var (
+	// GitVersion is the Git revision hash
+	GitVersion = "dev"
+)
+
 func Iota(low int, high int) (made []int) {
 
 	made = make([]int, high-low)
@@ -46,9 +51,6 @@ func SignedPercentDifference[T constraints.Float | constraints.Integer](
 	current T,
 	previous T,
 ) (difference float64) {
-	//return ((current - previous) / (float64(current+previous) / 2.0)) * float64(
-	//100,
-	//	)
 	fCurrent := float64(current)
 	fPrevious := float64(previous)
 	return ((fCurrent - fPrevious) / fPrevious) * 100.0
@@ -203,3 +205,7 @@ func ApproximatelyEqual[T float32 | float64](truth T, maybe T, fudge T) bool {
 	diff := math.Abs((bTruth - bMaybe))
 	return diff < bFudge
 }
+
+func UserAgent() string {
+	return fmt.Sprintf("goresponsiveness/%s", GitVersion)
+}