adding 'connect as' link in the domain list, (I craved for ... and today I remembered I have commit right ;) ), and removed a _parent target in another link

Closes: #1212

Closes: #1211
Patch by: dguedj

 * close #1185

Not to propose subdomain option for a new accout when admin don't have domain.

small API change: do not include the db size in get_db_list(), which improves performance on big databases

Closes: #1162

Closes: #1154

same domain

this is to encourage better security practices by forcing users to use
HTTPS and a canonical URL.

eventually, this is a step towards getting rid of the global /webmail/
alias too.

See #170
See #101
See #1080

Permettre à un (sous) administrateur d'affecter au choix le domaine entre ceux déclarés pour son compte ou celui générique du serveur (défini par l'admin général).

close #1087

Remplate intval() par floatval() sinon les quotas (ex: bande passante) sont limites a 2147483647 (1.99 gigs)

 * remove the redundant "MySQL" in "MySQL users"
 * move that "Users" menu lower down to make it obvious "MySQL" is all about "Databases"

 * the menu is now named "Administration" (instead of "Reseller")
 * "Admin Control Panel" is now renamed "AlternC configuration"

quotas and al

group protected folders and FTP accounts with the file browser, under a category named 'Files and directories'