Some erros/warnings that i found on my install logs

Hi
I found some errors/warnings on my install log file on Centos 6.6 64bit and i am posting them here that maybe need a fix:

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Code:

Installing nginx
.........................................................
error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key
error: "net.bridge.bridge-nf-call-iptables" is an unknown key
error: "net.bridge.bridge-nf-call-arptables" is an unknown key

Code:

Installing header files:  /usr/local/include/php/
grep: /etc/centminmod/php.d/igbinary.ini: No such file or directory
grep: /etc/centminmod/php.d/apc.ini: No such file or directory
service php-fpm restart
Gracefully shutting down php-fpm . done
Starting php-fpm  done
Error: Package: 2:postfix-perl-scripts-2.6.6-6.el6_5.x86_64 (base)
Requires: postfix = 2:2.6.6-6.el6_5
Installed: 2:postfix-2.6.6-6.0.1.el6.centos.x86_64 (@centosplus)
postfix = 2:2.6.6-6.0.1.el6.centos
Available: 2:postfix-2.6.6-6.el6_5.x86_64 (base)
postfix = 2:2.6.6-6.el6_5
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
du: cannot access `/var/mail/root': No such file or directory
(standard_in) 1: syntax error
mkfifo: cannot create fifo `/var/spool/postfix/public/pickup': File exists

Code:

make[1]: Entering directory `/svr-setup/openssl-1.0.2/engines'
make[1]: warning: jobserver unavailable: using -j1.  Add `+' to parent make rule.

Code:

warning: inlining failed in call to ‘igbinary_serialize_array’: call is unlikely and code size would grow

All working on my server and they may no need any fix but i just post them

Thanks