users: add a setting to set the default expiration for shares

Fixes #960

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

internal/httpclient/httpclient.go

@@ -12,6 +12,7 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+// Package httpclient provides HTTP client configuration for SFTPGo hooks
 package httpclient
 
 import (