property value can't have space if submitted from "Force build" or "Resubmit build" form

[liucougar]

in file buildbot/status/web/base.py :

def getAndCheckProperties(req):
        ...
        if not re.match(r'^[w.-/~:]*$', pname) 
                or not re.match(r'^[w.-/~:]*$', pvalue):
            log.msg("bad property name='%s', value='%s'" % (pname, pvalue))
            return None

and particular reason to not allow anything in pvalue? (I can understand pname should probably be a valid python identifier, but why put the same limitation on pvalue?

[jmr]

Duplicate of #985.