avoid a segfault, if ulimit is set to unlimited
make constants from maxfd values (#1300)

its good practice to use constants instead of (random) values.

Signed-off-by: Sven Nierlein <sven@nierlein.de>
Merge pull request #1304 from monitoring-plugins/pr-1183-enhanced

merge pull request #1300 while moving values to constants
Use kernel reception time on ICMP packets to compute rtt.

This commit uses the SO_TIMESTAMP feature of setsockopt to fetch
kernel reception time of ICMP packets. This avoids invalid
computations of rtt on machines with heavy load and/or heavy
network traffic.
Don't mix variable declarations and code

We still support pre-C99 compilers.
check_icmp: Fix a few type errors
Added missing CR in DESCRIBE request.
NEWS: Mention the check_real fix

Closes #1290.
Added particular ps command for HP-UX (check_procs)
NEWS: Mention HP-UX fixes for check_procs

Closes #1288.
update .gitignore

Add build-aux/test-driver to .gitignore.

Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
We are now monitoring-plugins