grep IP at the start of lines

I'm not sure if this regex works best, so I'm patching this single file as a sample.

Don't forget to update `mail-whois-lines.conf` after this patch got merged.

For the following logs, `grep '[^0-9]199.48.161.87[^0-9]'` will output nothing, while `grep '\([^0-9]\|^\)199.48.161.87[^0-9]'` works:
<pre>199.48.161.87 - - [09/Sep/2014:13:38:54 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:38:56 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:38:58 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:00 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:05 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:05 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:13 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:21 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:32 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:34 +0800] "POST /wp-login.php HTTP/1.1" 403 4674 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:34 +0800] "POST /wp-login.php HTTP/1.1" 403 168 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:34 +0800] "POST /wp-login.php HTTP/1.1" 403 168 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:35 +0800] "POST /wp-login.php HTTP/1.1" 403 168 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:35 +0800] "POST /wp-login.php HTTP/1.1" 403 168 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com
199.48.161.87 - - [09/Sep/2014:13:39:35 +0800] "POST /wp-login.php HTTP/1.1" 403 168 "-" "Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0" - hitsjapan.com</pre>
increase code coverage
actions: bug fix in lambdas in checkBan, because getBansMerged could return None (purge resp. asynchronous addBan), make the logic all around more stable;
test cases: extended with test to check action together with database functionality (ex.: to verify lambdas in checkBan);
database: getBansMerged should work within lock, using reentrant lock (cause call of getBans inside of getBansMerged);
Test cases fixed:
	testFail2BanExceptHook - use local sys.__excepthook__ to check was really executed and prevent write error in stderr.
BF: fix $ for % in jail.conf. Debian bug #767255
code review
few confusing merge info helper
Use multiport for firewallcmd-new
Merge pull request #840 from opoplawski/firewallcmd-multiport

Use multiport for firewallcmd-new
Merge pull request #807 from xslidian/patch-1

grep IP at the start of lines
improving grepping
ChangeLog for firewallcmd-new multiport support
Merge pull request #841 from opoplawski/firewallcmd-multiport

ChangeLog for firewallcmd-new multiport support
Bug fix in formatJournalEntry, gh-851

 Unhandled exception in fail2ban 0.9.1 #851
Merge pull request #852 from sebres/patch-1

Bug fix in formatJournalEntry, gh-851
Add ignoreregex to avoid warning on start
Add ignoreregex to avoid warning on start
Merge pull request #858 from g1franc/master

Add ignoreregex to avoid warning on start
Separate php-url-fopen logpath by newline
Merge pull request #869 from opoplawski/logpath

Separate php-url-fopen logpath by newline