[Bug 1779443] [NEW] esp partitions should be mounted with "discard" option where applicable

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This is a bug report / feature request about Ubuntu installations
created by either the Ubuntu Desktop or Server (both 'live' and
classic/alternative) installer. 'ubiquity' may be the wrong package.

Currently, when you install any variant of Ubuntu to a storage type
which supports TRIM (discards), the following is placed in /etc/fstab:

UUID=1234-ABCD  /boot/efi       vfat    umask=0077      0       1

However, since the fstrim command cannot handle vfat file systems (and
vfat file systems are thus not handled by /etc/cron.weekly/fstrim), but
vfat file systems support the 'discard' option, they should be mounted
with this option if the underlying storage device can be determined to
support TRIM.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 4.15.0-23.25~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Jun 30 10:26:09 2018
InstallCmdLine: BOOT_IMAGE=/install/vmlinuz file=/cdrom/preseed/ubuntu-server.seed quiet ---
InstallationDate: Installed on 2017-04-29 (426 days ago)
InstallationMedia: Ubuntu-Server 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.8)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: partman-efi (Ubuntu)
     Importance: Wishlist
         Status: Triaged


** Tags: amd64 apport-bug xenial
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esp partitions should be mounted with "discard" option where applicable
https://bugs.launchpad.net/bugs/1779443
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