release: prepare 0.9.5 release

release: prepare 0.9.4 release

debian/redhat: prepare 0.9.3

debian/redhat: prepare 0.9.2

debian/redhat: prepare 0.9.1

build: add some integration tests

client: fix segfault when displaying some information

Due to 5ed4156, we were incorrectly
hiding information when it was present and displaying it when it was
absent (leading to a segfault).

Closes lldpd#152

release: 0.7.19 released

release: 0.7.18 released

build: .git may be a file

It happens when using a worktree.