proftpd: remove the script ftpmail

* Remove the ftpmail script to avoid confusion
  about it fails to run because it lacks a dependency
  on Mail/Sendmail.pm which is not shipped by default.
  Also it has not been maintained for more than 10 years as
  http://search.cpan.org/~mivkovic/Mail-Sendmail/Sendmail.pm.

* And it's bad to add the dependency perl module
  Mail/Sendmail.pm as it's too old and also send email to
  Proftp-devel@lists.sourceforge.net to ask guidance about
  ftpmail as below:
    Q: In my environment, the ftpmail fails to run as
       it lacks the dependency on Mail/Sendmail.pm which
       is not shipped by default and also not maintained more
       than 10 years as
       http://search.cpan.org/~mivkovic/Mail-Sendmail/Sendmail.pm.
    A: Patches for updates to the ftpmail script are highly
       encouraged!  If the Mail-Sendmail package is not to
       your preference, what would you suggest/prefer using
       instead?
  We don't plan to do more improvements about the perl module
  Mail-Sendmail now since it's not something we, or other distros
  apparently need as other distribution also not include the
  ftpmail script.

* The ftpmail is initially added as a perl script to send an email
  notification when upload proftpd log as below commit in
  https://github.com/proftpd/proftpd.git:

  commit 8d602d4bf01ef0c6464c7a16dbbe570a0322dc17
  Author: castaglia <castaglia>
  Date:   Thu Mar 6 03:06:14 2008 +0000

    Added ftpmail, a Perl script which reads a TransferLog FIFO and sends
    automatic email notifications for uploads.

Signed-off-by: Mingli Yu <Mingli.Yu@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>

meta-networking/recipes-daemons/proftpd/proftpd_1.3.5b.bb

@@ -111,6 +111,15 @@ do_install () {
         -e 's|${STAGING_DIR_NATIVE}||g' \
         -e 's|-fdebug-prefix-map=[^ ]*||g' \
         -i ${D}/${bindir}/prxs
+
+    # ftpmail perl script, which reads the proftpd log file and sends
+    # automatic email notifications once an upload finishs,
+    # depends on an old perl Mail::Sendmail
+    # The Mail::Sendmail has not been maintained for almost 10 years
+    # Other distribution not ship with ftpmail, so do the same to
+    # avoid confusion about having it fails to run
+    rm -rf ${D}${bindir}/ftpmail
+    rm -rf ${D}${mandir}/man1/ftpmail.1
 }
 
 INITSCRIPT_NAME = "proftpd"