Make sure variable doesn't contain a new line

cron/lang/en

@@ -81,6 +81,8 @@ lcedit_special_reboot=when system boots
 
 save_err=Failed to save cron job
 save_ecmd=You did not enter a command to execute
+save_ename=Missing or invalid environment variable name
+save_evalue=Invalid environment variable value
 save_euser=You must select a user
 save_euser2=User '$1' does not exist
 save_eallow=The user '$1' is not allowed to access cron

cron/save_env.cgi

@@ -38,6 +38,9 @@ foreach $f (@files) { &lock_file($f); }
 if ($in{'name'} !~ /^\S+$/) {
 	&error($text{'save_ename'});
 	}
+if ($in{'value'} =~ /\r|\n/) {
+	&error($text{'save_evalue'});
+	}
 if (!$in{'user'}) {
 	&error($text{'save_euser'});
 	}