fix issue 11089 toUpper doesn't work with 1:m mappings

Also fixes a typo in generic toCase, adds test cases for
previously fixed issue 9629
fix issue 11057 [REG2.064dev] New std.uni has icmp() partly broken
reenable unittest for mangle/demangle
Fixup `std.file.thisExePath`.

It's dangerous to add `assert(0)` at unreachable location because is will force the compiler to not show error if the location accidentally became reachable.
Add package QualifierOf template for internal use
fix Issue 10536 - std.typecons.wrap doesn't work with a class that defines opCast
fix Issue 10538 - std.typecons.wrap should consider opDispatch
Merge pull request #1386 from 9rnsr/fix_wrap

Issue 10536 & 10538 - std.typecons.wrap/unwrap bug fix and improvement
Merge pull request #1594 from blackwhale/fix-icmp

Fix regression in icmp
Fix Issue 10322 - ensure RandomSample is initialized before use

This patch fixes a problem where the public methods .index()
or .popFront() might be called without the first value of the
sample having been determined, which would then cause spurious
results.  The runtime initialization check currently performed
in .front has been extended to those methods.

The private boolean checks in the previous implementation have
been replaced with an enum indicating the algorithm to be used
(A, D or None) with None indicating that the sample has not
been initialized.

Step D1 of Algorithm D has been moved to the skip() function,
which results in a significant performance boost.

Unittests have been introduced to cover the cases where .index
or .popFront() are called before .front.

Finally, the .index method has been made a @property, which I
take to be an oversight of the original code.
Merge pull request #1533 from WebDrake/randomsample-init

Fix Issue 10322 - ensure RandomSample is initialized before use
Merge pull request #1596 from denis-sh/fixup-`std.file.thisExePath`

Fixup `std.file.thisExePath`.
Fixes Issue 9699 - Implement generic strip/stripLeft/stripRight functions which accept an element or a predicate.
Fixes Issue 11123 - std.getopt should support function callbacks.
Merge pull request #1311 from AndrejMitrovic/Fix9699_2

Issue 9699 - Implement generic strip/stripLeft/stripRight functions
Merge pull request #1601 from AndrejMitrovic/Fix11123

Issue 11123 - std.getopt should support function callbacks.
fix property enforcement
Merge pull request #1604 from 9rnsr/enforceProp

fix property enforcement
Merge pull request #1595 from rainers/reenable_demangle_test

reenable unittest for mangle/demangle
Fixup for issue 9565

Remove unnecessary else block so right not it's never used.