Merge branch 'bg/xcalloc-nmemb-then-size'

Like calloc(3), xcalloc() takes nmemb and then size.

* bg/xcalloc-nmemb-then-size:
transport-helper.c: rearrange xcalloc arguments
remote.c: rearrange xcalloc arguments
reflog-walk.c: rearrange xcalloc arguments
pack-revindex.c: rearrange xcalloc arguments
notes.c: rearrange xcalloc arguments
imap-send.c: rearrange xcalloc arguments
http-push.c: rearrange xcalloc arguments
diff.c: rearrange xcalloc arguments
config.c: rearrange xcalloc arguments
commit.c: rearrange xcalloc arguments
builtin/remote.c: rearrange xcalloc arguments
builtin/ls-remote.c: rearrange xcalloc arguments

diff --cc config.c
Simple merge

diff --cc diff.c
Simple merge

diff --cc imap-send.c
Simple merge

diff --cc transport-helper.c
Simple merge