o Merge defaults and requirements.
o Get rid of get_default_sysctl_value().
o Manually set 'type' for e.g. boot enviroment tunables.
o Cache sysctl map once per boot.
o Edit system defaults for easier override.
While sysctls might change when (un)loading kernel modules the
risk of missing something vital is not given. We could always
flush the cache file in that case later.
This sort of completes the previous effort to improve the
sysctl handling. The idea to embed sysctls into the config.xml
is certainly valid, but for some values we needed more leeway
for system defaults and changing them over time, which lead
to this state where we can drop config.xml default tunables
since the system will now apply and display then for the same
visibility but offer less incentive to change these values.
One thing missing here is adding a system tunable override
(plus sign) for system values, but we shall deal with this later
because for now they can always be added manually by copy+paste.
Also it seems that sysctl -ad returns sysctls that the kernel
considers sysctls with no value. These are likely read-only
of some type so bring them in as well with a blank value.
Mark unsupported and read-only with text-danger since their
use is not doing anything for the system.
o Only modify default sysctls when default is known
o Let user know a default is not available for tunable
o Parse system descripton and type and show in GUI
width, align, valign, cellpadding, cellspacing, border, summary
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Error: The align attribute on the table element is obsolete. Use CSS instead.
Error: The valign attribute on the table element is obsolete. Use CSS instead.
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