Macintosh, 5.10.29

Changelog:

- Fix brief flash of Manager window at OS 10.5 system startup

- Fix compiler warnings when building boinc_cmd under OS 10.5

- Fix compiler warnings when building boinc_cmd under OS 10.5, fix brief flash of Manager window at OS 10.5 system startup

- Strip additional symbols from deployment product

- Better error-handling in sandbox setup code

- SS: Work around a poorly understood problem calling MPLibraryIsLoaded() on OS 10.3.x when it was built using XCode 3.0 on OS 10.5

- Additional changes to release scripts for compatibility with new PackageMaker

Additional information from the man himself:
It\'s a quick fix for a screensaver problem version 5.10.28 had when
run on Mac OS 10.3. (5.10.28 fixed some problems with the new OS
10.5 Leopard, but broke the screensaver on OS 10.3 Jaguar). It also
fixed two other bugs:

- Mac: Fix brief flash of Manager window at OS 10.5 system startup.
Mgr SG: Fix SG preferences bug: set \"custom\" checkmark only if global_prefs_override.xml file exists.

The Simple Gui Preferences bug fix will appear in the next Windows
and Linux releases, probably 5.10.30, because Rom has additional
changes which need to be alpha tested. I wanted to get this out
right away because of the screensaver bug.
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