MFH: r405052 r407795 r408138 r410451 r412140

Update to 3.6.3 (regularly bugfix release)

Changelog: https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.6.2_.282016-1-1.29

• Update to 3.7
• Remove unneeded patch (about unsafe SSL protocols)

Changelog: https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.7_.282016-2-1.29

Update to 3.7.1 (out-of-cycle bugfix release)

Changelog: https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.7.1_.282016-2-3.29

Update to 3.7.2

Changelog: https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.7.2_.282016-3-1.29

Update to 2.7.3

Changes: https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.7.3_.282016-3-29.29

Security: e1085b15-f609-11e5-a230-0014a5a57822

Approved by: ports-secteam (erwin@)