ADD: MultiArc - ZPAQ archiver (fixes #447)

(cherry picked from commit 239299b0ce)

multiarc.ini

@@ -112,6 +112,24 @@ Enabled=0
 Output=0
 Debug=0
 
+[ZPAQ]
+Archiver=zpaq
+Description=ZPAQ - http://mattmahoney.net/dc/zpaq.html
+IDSeekRange=0
+Extension=zpaq
+Start=
+End=shown
+Format0=- yyyy-tt-dd hh:mm:ss$z+$aaaaa$n+
+List=%P l %AQA
+Extract=%P x %AQA {%S} {-key %W}
+ExtractWithoutPath=
+Test=%P l %AQA -test
+Add=%P a %AQA %FQU {%S} {-key %W}
+FormMode=1
+Enabled=0
+Output=0
+Debug=0
+
 [FreeArc]
 Archiver=arc
 Description=FreeArc 0.67