Update to 1.0.13

ChangeLog: (September 11, 2016)

Trac 1.0.13 provides around a dozen bug fixes and minor enhancements. The following are some highlights:

Use locale environment variables to negotiate locale on console (#12418).
    Fixed using incorrect revisions when downloading a zip file via browser page from Git repository (#12557).

PR: 212707
Submitted by: joneum@bsdproject.de