fix: typo in messages of checklibs.c
Merge pull request #419 from steenpass/rlimit_sw

raise RLIMIT_NPROC if necessary for fork()
fix: ring constructions with wrong coeffs (tr.517)
chg: res changes: ring construction (tr.517)
fix: avoid int overflow in rlimit.c
(cherry picked from commit 0d44b3386987b041cec4321f5488994c04dff538)

Signed-off-by: Andreas Steenpass <steenpass@mathematik.uni-kl.de>