Extra tweaks due to feedback from kaiwangchen: ; starts comments if at the start of a line

lib/MySQLConfig.pm

@@ -310,7 +310,7 @@ sub parse_option_file {
    # Parse the "var=val" lines.
    my ($config, $dupes) = _parse_varvals(
       map  { $_ =~ m/^([^=]+)(?:=(.*))?$/ }
-      grep { $_ !~ m/^\s*#/ }  # no # comment lines
+      grep { $_ !~ m/^\s*[#;]/ }  # no # comment lines
       split("\n", $mysqld_section)
    );
 

t/lib/MySQLConfig.t

@@ -849,6 +849,12 @@ is(
   "..and removing comments doesn't leave trailing whitespace"
 );
 
+is_deeply(
+   [ sort keys %{$config->variables} ],
+   [qw( password something user )],
+   "start of line comments with # or ; are ignored"
+);
+
 # #############################################################################
 # Done.
 # #############################################################################

t/lib/samples/configs/mycnf-kc-001.txt

@@ -2,3 +2,7 @@
 user=mysql # comment
 password="password # still part of it!"# comment
 something='something ; or # another'      # comment
+;semicolon="start of line comment with ;"
+#pound="start of line comment with #"
+   ;spacecolon
+   #spacepound