Bump Symbol::Global::Name dep for 5.19.3 and above

That release includes the equivalent of ed759dbe; we include it
contengently so that other perl versions do not have an unnecessary
version bump in a stable series.
Always append an extra delimeter for multiple autocompletes

This hints at the delimeter, in the case of email autocomplete, for
instance.
win32 is not a supported platform; remove remaining incidental mentions of it

The mention of Win32::Locale::Lexicon remains, because
I18N::LangTags::Detect version 1.04 and below (i.e. perl prior to
5.14.0) generates "used only once" warnings without it.
Optimize some images

Saved around 2KB.
I#28640: Set headers for static content

This is a regression fix since at some point the static content served
from /static/ path had the 'Expires' and 'Cache-Control' headers removed
(probably when started serving it with Static middleware). Additionally,
add support for static content served from custom StaticRoots.
Optimize the ordering of resources

Correctly ordering stylesheets and scripts enables better parallelization
of downloads and speeds up browser rendering time.

https://developers.google.com/speed/docs/best-practices/rtt#PutStylesBeforeScripts
Avoid error on queue change when queues have equal statuses

Currently if you have a mapping between two queues such that
a status is the same for two queues, RT issues an error because
the status is the same:

[error]: Status change to confirmed failed on Queue change:
That is already the current value

Don't try to update the status if the new value retrieved from
the map is the same as the current value.
Merge branch '4.2/perl-5.19-symbol-global-name' into 4.2-trunk
Merge branch '4.2/autocomplete-multiple-trailing-comma' into 4.2-trunk
Remove mention of IIS, which RT does not run under
mod_auth_pwcheck was Apache 1.3 only; replace with Apache 2.x equivalent

This serves to further point out the $WebRemoteUserGecos is quite
possibly unused and unnecessary.
Merge branch '4.2/remove-win32' into 4.2-trunk
Merge branch '4.2/frontend-peformance-tweaks' into 4.2-trunk
Merge branch '4.2/cache-control-regression' into 4.2-trunk
Merge branch '4.2/lifecycle-same-status-error' into 4.2-trunk