Add fake sendmail script, adjust travis config to use it

.travis.yml

@@ -11,5 +11,8 @@ before_script:
   - smtp-sink -d "%d.%H.%M.%S" localhost:2500 1000 &
   - cd test
   - cp testbootstrap-dist.php testbootstrap.php
+  - mkdir -p /var/qmail/bin
+  - cp fakemail.sh /var/qmail/bin/sendmail
+  - cp fakemail.sh /usr/sbin/sendmail
 script:
   - phpunit phpmailerTest

test/fakesendmail.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+#Fake sendmail script, adapted from:
+#https://github.com/mrded/MNPP/blob/ee64fb2a88efc70ba523b78e9ce61f9f1ed3b4a9/init/fake-sendmail.sh
+numPath="/tmp/fakemail"
+
+mkdir -p $numPath
+
+if [ ! -f $numPath/num ]; then
+echo "0" > $numPath/num
+fi
+num=`cat $numPath/num`
+num=$(($num + 1))
+echo $num > $numPath/num
+
+name="$numPath/letter_$num.txt"
+while read line
+do
+echo $line >> $name
+done
+chmod 777 $name
+/usr/bin/true