No manual db setup in Debian

In Debian, there's no need to do manual configuration
of the database settings, as this is handled by debconf.
This patch removes the step for the Debian guide, and also
removes the step where Glance daemons are restarted (also
not needed in Debian).

Change-Id: I964669492277b0d13a46c8ad8009c51aa6e0c493
Closes-bug: #1310048
Fix use of soft-hyphens in security-guide

The security-guide used two soft-hyphens in a CFLAGS string (soft-hyphen
encoded as <C2><AD> for the commit message):

CFLAGS="[...] -<C2><AD>D_FORTIFY_SOURCE=2 <C2><AD>O2 [...]"

The result looks something like this in a web browser:

CFLAGS="[...] -D_FORTIFY_SOURCE=2 O2 [...]"

If you copied the string from the browser into a text-editor, you'd get
the soft-hyphens back.

The correct string must look like this:

CFLAGS="[...] -D_FORTIFY_SOURCE=2 -O2 [...]"

Change-Id: I9fc1aa2a963d3c9afd93498e7ab91e5c4ac0c5aa
Merge "No manual db setup in Debian"