autotools: Move the xsltproc conditions to the rule

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
autotools: Include a generic local-rules.mk file

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
autotools: Suffix \-wrapped lists by $(null)

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
man: Fix typo

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
autotools: Add a man condition for default features

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
man/nm: Add an example with the expected output

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
man/time: Add examples

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
man/j4status.conf: Add examples

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>