Revision 457486

Update to 2.17.15.

* Don't check for direct command use for ONLY_FOR_ARCHS_REASON
  and NOT_FOR_ARCHS_REASON when a specific arch has been specified. [1]
* Preserve an original variable value to make sure the check for copying
  dependecies is actually performed.
* Don't complain about incon installation if the port is a Qt5 port. [2]
* Check that PLIST_FILES entries do not contain %%FOO% notation. [3]
* Check that DOCS and EXAMPLES are defined as OPTIONS when using %%PORTDOCS%%
  and %%PORTEXAMPLES%%. [4]
* Check that if USE_LDCONFIG is defined, then the port installs shared
  objects. [5]
* Check that when USE_KDE is defined, then USES=kde:5 is also defined. [6]
* Ignore flavors when trying to find port directories. [7]
* Revert the fix for 221971 (USE_GITHUB).  More debate is needed here.

PR:		223285 [1]
		223498 [2]
		223539 [3]
		223541 [4]
		223762 [5]
		224140 [6]
		224245 [7]
Submitted by:	adridg [2]
		mat [4]
		224245 [7]