Merge branch 'mg/pushurl'

* mg/pushurl:
avoid NULL dereference on failed malloc
builtin-remote: Make "remote -v" display push urls
builtin-remote: Show push urls as well
technical/api-remote: Describe new struct remote member pushurl
t5516: Check pushurl config setting
Allow push and fetch urls to be different

diff --cc builtin-remote.c
Simple merge

diff --cc remote.c
Simple merge

diff --cc remote.h
Simple merge