Bug 167978 - Fix Throw*Error l10n regressions and add a test to catch more. Patch by gerv; r=bbaetz.

2xr = bbaetz

2xr=JayPee

2xr = bbaetz

Adds Mac OS X 10.1 and 10.2 to the OS list on new installations.  Existing installations will need to add these manually in
localconfig.  Also corrects spelling from "MacOS X" to "Mac OS X" per Apple's encouraged usage.
r= caillon

r=justdave x2

2xr=justdave

r=joel, jake

r=joel x2

r=joel, preed

2xr = timeless

2xr=bbaetz

2xr = bbaetz

Also fixes Duplicate Bug 165685 When switching from no cookiepath to using cookiepath, old cookie gets in the way

r=joel, preed

r=joel x2

multiple values (e.g., CC)
patch by "Randall M! Gee", r=bbaetz, myk

* NO CODE CHANGES *

Bug 86651 - cvs-update was setting sticky dates which made commiting changes and getting updates more difficult
r=bbaetz, jouni

2xr=bbaetz

r=joel x2

r=joel x2

r=joel x2

r= joel x2

Tests now detect optional modules and only exclude optional files
if optional module dependencies are not met.
Also major indent cleanup
r=timeless

r=bbatez, timeless

r=joel x2

patch by jussi@comlink.fi (Jussi Sirpoma), r=bbaetz x2

Fix for bug 163541: Corrects problem with previous patch that causes primary headers not to appear on some installations.
2xr=bbaetz

2xr=bbaetz