Change Linux fasttimer implementation back to RDTSC - using a reliable syscall was REALLY chewing CPU time.  Sigh.  I didn't realize how incredibly often this gets called.  So, back to the assembly.
But be more careful with CPU clock count on linux, so the fasttimer values are much more accurate than they were the last time we were with RDTSC, in absolute terms - back in the right order of magnitude anyway.

Also change many instances of Mhz to MHz.
Also some minor comment fixes.

move LLEventTimer into its own source module.  everyone includes it, almost no-one wants it.  now I can dick with it a bit without rebuilding the world, at least. :)

Ugh. Update on Tofu's patch for this bug.
Reviewed by Richard

For both the (so far unused) generic KEY form and the KEY = T* form, provide
key_iter, beginKeys(), endKeys().
Change instance_iter so that when dereferenced, it gives you a T& rather than
a T*, to be more harmonious with a typical STL container. (You parameterize
LLInstanceTracker with T, not with T*.)
Fix existing usage in llfasttimer.cpp and lltimer.cpp to agree.
For the KEY = T* specialization, add T* getInstance(T*) so client isn't forced
to know which variant was used.
Add unit tests for uniformity of public operations on both variants.

ignore-dead-branch

Result of svn merge -r107256:107258 svn+ssh://svn/svn/user/phoenix/license_2009_merge into trunk. QAR-1165

svn merge -r106715:HEAD svn+ssh://svn.lindenlab.com/svn/linden/branches/q/notifications-merge-r106715 .  QAR-1149 -- Final merge of notifications to trunk.

QAR-907: svn merge -r 98908:98910 svn+ssh://svn/svn/linden/qa/sim-metrics/sim-metrics2-release-merge-98903 into release

merge release@93398 viewer-merge-1@94007 -> release
dataserver-is-deprecated

dataserver-is-deprecated

dataserver-is-deprecated
for-fucks-sake-whats-with-these-commit-markers

Passed QA as part of QAR-491.

svn merge svn+ssh://svn.lindenlab.com/svn/linden/release@84853
svn+ssh://svn.lindenlab.com/svn/linden/branches/moss/signalcrap-merge1

Result of svn merge -r71162:71205 svn+ssh://svn/svn/linden/branches/new-license into release. only changes files which are not deployed or the comments section of code.

EFFECTIVE MERGE: svn merge -r 66133:68118 svn+ssh://svn/svn/linden/branches/maintenance into release

Actual action: branched maintenance-r68118, merged in release, then copied result into release

svn merge --ignore-ancestry  svn+ssh://svn.lindenlab.com/svn/linden/release@66449 svn+ssh://svn.lindenlab.com/svn/linden/branches/Branch_1-18-1@67131

* WARNING *:  maintenance r64837 is not the last rev to use in the next merge. use r65269

svn merge svn+ssh://svn.lindenlab.com/svn/linden/release@56429 svn+ssh://svn.lindenlab.com/svn/linden/branches/maintenance@56431

This turned up the following "lost" changes:

	llapp.cpp (from maintenance r55371) - SIGPIPE fix, possibly
	llfontgl.cpp (from maintenance r50207) - whitespace only
	inventorybridge.cpp (property - non-executable)
	skins/xui/*/* (from maintenance r55380) - XML processing instruction went AWOL