Added URLEncodeTask.

[siad007]

Added URLEncodeTask to urlencode() a value to a property:

<urlencode property="a.property" value="äöü" />
<echo msg="${a.property}" />

[codecov]

Codecov Report

Merging #973 into master will increase coverage by 0.02%.
The diff coverage is 63.15%.

@@             Coverage Diff              @@
##             master     #973      +/-   ##
============================================
+ Coverage      44.9%   44.92%   +0.02%     
- Complexity     9925     9934       +9     
============================================
  Files           499      500       +1     
  Lines         24053    24072      +19     
============================================
+ Hits          10800    10814      +14     
- Misses        13253    13258       +5

Impacted Files	Coverage Δ	Complexity Δ
classes/phing/tasks/ext/property/URLEncodeTask.php	63.15% <63.15%> (ø)	9 <9> (?)
classes/phing/tasks/system/PropertyTask.php	82.5% <0%> (+1.25%)	73% <0%> (ø)	⬇️

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