Quote unset array element to avoid globbing interference (Alioth: #314708)
Various mostly array element unsetting fixes under failglob
ssh-add, ssh-keygen: -? needs to be quoted under failglob (Alioth: #314709)
Quote _filedir arguments when appropriate to prevent failglob failures
slapt-src: split options from their arguments
slapt-{get,src}: Fix issue with sed not being able to handle some characters

 # LC_ALL=C slapt-get --search "^moo" | sed -ne "/^moo/{s/ .*$//;p}"
 moos-project-viewer-2.8.1-x86_64-1sl [inst=no]: moos-project-viewer - Free Viewer for Microsoft®

 # LC_ALL=C slapt-get --search "^moo" | LC_ALL=C sed -ne "/^moo/{s/ .*$//;p}"
 moos-project-viewer-2.8.1-x86_64-1sl
gendiff: Quoting suffix pattern to avoid triggering failglob
sbopkg, slapt-{get,src}: expand tilde in config file name

This fixes following [[ -r "$config" ]] when file name begins with ~.
slapt-src: Handle --config=FILE option properly

This is a followup to commit 3a65be4a18.
_filedir_xspec: Fix with failglob on
lvm: _lvm_count_args parameter must be quoted in order to failglob not to complain
(testsuite) Add vgcreate test case for _lvm_count_args with failglob on
_lvm: using a single-pattern case and invoking function according to words[1]
umount: Fix mount points escaping/unescaping with Bash-4.3
(testsuite): move testing of _linux_fstab() to umount.exp

The function is only used for umount completion.
_parse_help: Fix failglob failures (Alioth: #314707)
modprobe: fix params with multi-line descriptions

The command `modprobe -p nouveau` outputs:

    tv_norm:Default TV norm.
    		Supported: PAL, PAL-M, PAL-N, PAL-Nc, NTSC-M, NTSC-J,
    			hd480i, hd480p, hd576i, hd576p, hd720p, hd1080i.
    		Default: PAL
    		*NOTE* Ignored for cards with external TV encoders. (charp)
    tv_disable:Disable TV-out detection (int)
    ...

This breaks module parameter auto-completion, so only suggest parameters
which are not preceded by whitespace. Tested with kmod 17-1 on Arch
Linux.

Modified-By: Ville Skyttä <ville.skytta@iki.fi>
modprobe: Try parsing help before using hardcoding option list
ssh-add, ssh-keygen: -? needs to be quoted under failglob (take 2) (Alioth: #314709)
isql: Fix failglob failure