[web] Don't raise ProcessFormError if there is no value specified
a03376213747 introduced a slight modification in None / empty string values and
with it a regression where an exception is raised on empty values, while we
should simply consider no value is specified and return None.
.TH cubicweb\-ctl 1 "2010-01-14" cubicweb\-ctl
.SH NAME
.B cubicweb\-ctl
\- cubicweb control utility
.SH SYNOPSIS
.B cubicweb-ctl <command>
[
.I OPTIONS
] [
.I <command arguments>
]
.SH DESCRIPTION
.PP
CubicWeb utility to create and control instances, and more generally do all
cubicweb's related tasks you can have to do using the command line. Available
commands will depends on which part of the framework are installed.
.PP
Type
.B "cubicweb\-ctl <command> \fB\-\-help\fR"
for more information about a specific command.
.SH COPYRIGHT
Copyright (c) 2003-2010 LOGILAB S.A. (Paris, FRANCE).
http://www.logilab.fr/ -- mailto:contact@logilab.fr