all: update the go.mod

Set the minimum Go to 1.18 and update the share modules.

When this program written, the ini library does not have the Unmarshal
function, so we load the configuration by reading each key and parse it
manually.

Now that we have Unmarshal function, the way we parse the configuration
is simplified so does the way configuration written.
This changes the accept_backend, capture_request_header written.
Instead of using comma to set multiple values, now it must be written
one key and one value on different line.

1 files changed, 2 insertions, 5 deletions

diff --git a/tagpreprocessor.go b/tagpreprocessor.go
index 2be8846..64a9bec 100644
--- a/tagpreprocessor.go
+++ b/tagpreprocessor.go
@@ -5,7 +5,6 @@
 package haminer
 
 import (
-	"errors"
 	"regexp"
 	"strings"
 )
@@ -16,11 +15,9 @@ type tagPreprocessor struct {
 	repl  string
 }
 
-//
 // newTagPreprocessor create and initialize replace tag pre-processing.
 // The regex and repl strings must be enclosed with double-quote, except for
 // repl it can be empty.
-//
 func newTagPreprocessor(name, regex, repl string) (
 	retag *tagPreprocessor, err error,
 ) {
@@ -29,10 +26,10 @@ func newTagPreprocessor(name, regex, repl string) (
 	repl = strings.TrimSpace(repl)
 
 	if len(name) == 0 {
-		return nil, errors.New("newTagPreprocessor: empty name parameter")
+		return nil, nil
 	}
 	if len(regex) == 0 {
-		return nil, errors.New("newTagPreprocessor: empty regex parameter")
+		return nil, nil
 	}
 
 	re, err := regexp.Compile(regex)