Low: using $(MAKE) variable, boost parallel build time

which can be easily around 50% or more, depending on the HW (here
i7-3520M) and the level of parallelism:

$ ./configure; make clean; time make -j3
[...]
make[1]: warning: jobserver unavailable: using -j1.  Add `+' to parent
         make rule.
[...]
real        1m7.858s
user        0m58.931s
sys 0m5.991s

$ git am Low-using-MAKE-variable-boost-parallel-build-time.patch
$ ./configure; make clean; time make -j3
[...]
real        0m36.716s
user        1m15.494s
sys 0m6.016s

$ git reset HEAD^; git checkout .
$ ./configure; make clean; time make -j3
[...]
make[1]: warning: jobserver unavailable: using -j1.  Add `+' to parent
         make rule.
[...]
real        1m7.698s
user        0m58.568s
sys 0m6.183s

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
Fix: membership: Avoid duplicate peer entries in the peer cache
Merge pull request #517 from davidvossel/1.1.12-testing

Fix: membership: Avoid duplicate peer entries in the peer cache
Low: pengine: fix typo

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
Merge pull request #518 from jnpkrn/pengine-typo

Low: pengine: fix typo
Update security.txt

Fix spelling error
Update security.txt

More spelling fixes
Update security.txt

and more spelling fixes
Fix spelling error
Merge pull request #523 from b1-systems/master

Update security.txt
Merge pull request #516 from jnpkrn/build-speedup

Low: using $(MAKE) variable, boost parallel build time
Merge pull request #524 from b1-systems/typo_fix

Fix spelling error