Rename function and adjust comment (#2306)

target/scripts/helper-functions.sh

@@ -316,8 +316,8 @@ function _obtain_hostname_and_domainname
   DOMAINNAME="${DOMAINNAME:-${HOSTNAME}}"
 }
 
-# Remove string input with empty line, only whitespace or `#` as the first non-whitespace character.
-function _strip_comments
+# Check if string input is an empty line, only whitespaces or `#` as the first non-whitespace character.
+function _is_comment
 {
   grep -q -E "^\s*$|^\s*#" <<< "${1}"
 }

target/scripts/helpers/relay.sh

@@ -28,7 +28,7 @@ function _relayhost_sasl
     # add domain-specific auth from config file:
     while read -r LINE
     do
-      if ! _strip_comments "${LINE}"
+      if ! _is_comment "${LINE}"
       then
         echo "${LINE}" >> /etc/postfix/sasl_passwd
       fi