Log Message:
entr: Update to 4.3

pkgsrc changes:
 - Update HOMEPAGE and MASTER_SITES to current ones

Changes:
== 4.3: September 25, 2019
 - Move hosting from bitbucket.org to github.com
 - Rename tag names from entr-X.Y to X.Y
 - Replace hg with git as a dependency for system-test.sh

== 4.2: March 28, 2019
 - Use pledge(2) on OpenBSD
 - New '-a' option enables response to events that occur while the utility is
   running
 - Error messages direct users to http://eradman.com/entrproject/limits.html
 - Correctly report error when a file cannot be reopened