ports/184968: portlint: display line numbers in report

[RK]

>Number:         184968
>Category:       ports
>Synopsis:       portlint: display line numbers in report
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Wed Dec 18 16:30:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     RK
>Release:        10.0RC1
>Organization:
>Environment:
>Description:
% portlint -A
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
WARN: Makefile: only one MASTER_SITE configured.  Consider adding additional mirrors.
WARN: Makefile: use of DISTFILES with single file discouraged. distribution filename should be set by DISTNAME and EXTRACT_SUFX.
WARN: Makefile: DISTFILES/DISTNAME affects WRKSRC. take caution when changing them.
0 fatal errors and 4 warnings found.

portlint would be way easier to use if it displays line numbers in its messages like:

WARN: Makefile[34]: .....

>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: