Add test on url syntax

htdocs/langs/en_US/companies.lang

 # Dolibarr language file - en_US - companies
 CHARSET=UTF-8
 ErrorBadEMail=EMail %s is wrong
+ErrorBadUrl=Url %s is wrong
 ErrorCompanyNameAlreadyExists=Company name %s already exists. Choose another one.
 ErrorPrefixAlreadyExists=Prefix %s already exists. Choose another one.
 ErrorSetACountryFirst=Set the country first

htdocs/langs/fr_FR/companies.lang

 # Dolibarr language file - fr_FR - companies
 CHARSET=UTF-8
 ErrorBadEMail=e-mail %s invalide
+ErrorBadUrl=Url %s invalide
 ErrorCompanyNameAlreadyExists=Le nom de société %s existe déjà. Veuillez en choisir un autre.
 ErrorPrefixAlreadyExists=Le préfixe %s existe déjà. Veuillez en choisir un autre.
 ErrorSetACountryFirst=Définissez d'abord le pays

htdocs/soc.php

@@ -133,6 +133,12 @@ if ((! $_POST["getcustomercode"] && ! $_POST["getsuppliercode"])
 			$soc->error = $langs->trans("ErrorBadEMail",$soc->email);
 			$_GET["action"] = $_POST["action"]=='add'?'create':'edit';
 		}
+		if (! empty($soc->url) && ! isValidUrl($soc->url))
+		{
+			$error = 1;
+			$soc->error = $langs->trans("ErrorBadUrl",$soc->url);
+			$_GET["action"] = $_POST["action"]=='add'?'create':'edit';
+		}
 		if ($soc->fournisseur && ! $conf->fournisseur->enabled)
 		{
 			$error = 1;