runtests: use a unix domain socket path with the pid in the name

To make it impossible for test cases to access the file name without
using the proper variable for the purpose.

Closes #5264

diff --git a/tests/runtests.pl b/tests/runtests.pl
index 3c568f63370e14228623f274bdca0734b44e508f..82de7f7a8b89557d0fffa84516cff060699cdc27 100755 (executable)
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -5457,7 +5457,7 @@ $DICTPORT        = $base++; # DICT port
 $SMBPORT         = $base++; # SMB port
 $SMBSPORT        = $base++; # SMBS port
 $NEGTELNETPORT   = $base++; # TELNET port with negotiation
-$HTTPUNIXPATH    = 'http.sock'; # HTTP server Unix domain socket path
+$HTTPUNIXPATH    = "http$$.sock"; # HTTP server Unix domain socket path
 
 $maxport         = $base-1; # updated base port number