ENH: fix to use upstream --remove-rules

https://fedorahosted.org/firewalld/ticket/10
DOC: document required firewalld version as > 0.3.7.1
BF: remove duplication definition secion in webmin-auth
firewalld-0.3.8 release that support --remove-rules out so documenting this.
Merge pull request #412 from grooverdan/firewalld

ENH: enhance firewall-cmd to use firewall-0.8.3's --remove-rules
Add Fedora git repo of fail2ban package to DEVELOP
BF: fix to filter.d/wuftp to support pam authentication - Debian bug #665925
BF: fix dovecot filter for newer failure message. Closes Debian bug #709324
DOC: few more links for DEVELOP
Merge pull request #417 from grooverdan/debian-bug-709324-dovecot

BF: dovecot allow for newer fail message - Debian bug 709324
Merge pull request #416 from grooverdan/debian-bug-665925-wuftpd-pam

BF:  wuftpd pam filter fix (Debian bug 665925)
DOC: Untabifying and reindenting a bit ChangeLog
DOC: keeping Changelog release-phrases uniform, simplified intro, unified
Merge pull request #420 from yarikoptic/enh/release-0.8.11

DOC: release 0.8.11 - ChangeLog tidy
ENH: multiline filter for sendmail-spam. Closes gh-418
NF: gen_badbots script to (re)generate/update config/filter.d/apache-badbots.conf
ENH: regenerated config/filter.d/apache-badbots.conf
ENH: add filter.d/nginx-http-auth. Partially forfills #405
BF: missed action in nginx-http-auth
ENH: condense asterisk regexs for speed