LCGDM-1283: add xrootd export parameter

add "export MALLOC_ARENA_MAX=4"
Merge branch 'master from github into qa
do not set the NSRedirectPort param if the default ports are used

default ports are 80, 443.
don't set nsredirectport to keep compatibility with old
( < 0.14) version of lcgdm-dav.

With those, the nsredirectport with two arguments will not work,
so at least we want to keep it compatible with the default config.
Set dav_http(s)_port only on lcgdm-dav 0.14 and up.
fix typo in the zlcgdm-dav template
move to 0.2.0 release