- Finish up lang/python37 import

- Added python37 docs
- Added python37 support to Mk/

Reviewed by:	bapt
Approved by:	bapt (portmgr)
Differential Revision:	https://reviews.freebsd.org/D16159

Mk/Uses/python.mk

@@ -244,7 +244,7 @@ _INCLUDE_USES_PYTHON_MK=	yes
 # What Python version and what Python interpreters are currently supported?
 # When adding a version, please keep the comment in
 # Mk/bsd.default-versions.mk in sync.
-_PYTHON_VERSIONS=		2.7 3.6 3.5 3.4	# preferred first
+_PYTHON_VERSIONS=		2.7 3.6 3.7 3.5 3.4	# preferred first
 _PYTHON_PORTBRANCH=		2.7		# ${_PYTHON_VERSIONS:[1]}
 _PYTHON_BASECMD=		${LOCALBASE}/bin/python
 _PYTHON_RELPORTDIR=		lang/python

Mk/bsd.default-versions.mk

@@ -78,11 +78,11 @@ PERL5_DEFAULT:=		${_PERL5_FROM_BIN:R}
 PGSQL_DEFAULT?=		9.5
 # Possible values: 5.6, 7.0, 7.1, 7.2
 PHP_DEFAULT?=		5.6
-# Possible values: 2.7, 3.4, 3.5, 3.6
+# Possible values: 2.7, 3.4, 3.5, 3.6, 3.7
 PYTHON_DEFAULT?=	2.7
 # Possible values: 2.7
 PYTHON2_DEFAULT?=	2.7
-# Possible values: 3.4, 3.5, 3.6
+# Possible values: 3.4, 3.5, 3.6, 3.7
 PYTHON3_DEFAULT?=	3.6
 # Possible values: 2.3, 2.4, 2.5
 RUBY_DEFAULT?=		2.4

lang/python-doc-html/distinfo

-TIMESTAMP = 1530186903
+TIMESTAMP = 1530893316
 SHA256 (python/python-2.7.15-docs-html.tar.bz2) = 5582aa8f59c2d5457ae87e266000f9ef75ed041a02fa72bd988a5169aae8ebde
 SIZE (python/python-2.7.15-docs-html.tar.bz2) = 4627519
 SHA256 (python/python-2.7.15-docs-pdf-a4.tar.bz2) = f747ca034cae426876017c37dfac0648ae535ad0b95d1e3a27385feee602d956
@@ -15,11 +15,19 @@ SHA256 (python/python-3.4.8-docs-pdf-letter.tar.bz2) = 9c872acf121f95887420b5a54
 SIZE (python/python-3.4.8-docs-pdf-letter.tar.bz2) = 11993776
 SHA256 (python/python-3.4.8-docs-text.tar.bz2) = cbf9681c85f37144ffadee5a3e7a3506831c29b7310fa063ad2d4d97a1a33d2e
 SIZE (python/python-3.4.8-docs-text.tar.bz2) = 1988981
-SHA256 (python/python-3.6.6-docs-html.tar.bz2) = de6eab642fbf3134f53f8c79b38e827a25a29c39d1d6a874e2689eb6a5ba59b8
-SIZE (python/python-3.6.6-docs-html.tar.bz2) = 5989926
-SHA256 (python/python-3.6.6-docs-pdf-a4.tar.bz2) = 21b11f110f5de52978fdb78b3f83366a62429f70dabbed7fb5bced0327f8439a
-SIZE (python/python-3.6.6-docs-pdf-a4.tar.bz2) = 13758132
-SHA256 (python/python-3.6.6-docs-pdf-letter.tar.bz2) = 627beb90f5af6185e483059798cab337295bf615ea25e5993ed1014f194b45d1
-SIZE (python/python-3.6.6-docs-pdf-letter.tar.bz2) = 13757139
-SHA256 (python/python-3.6.6-docs-text.tar.bz2) = fc4c85ab1af70be7a2395c6dd1eb5bb32a0076244867ac168cc92529ce4f0b17
-SIZE (python/python-3.6.6-docs-text.tar.bz2) = 2145283
+SHA256 (python/python-3.6.5-docs-html.tar.bz2) = bb239691e3ace920e1692eef48c8d8e567407b30434afe462bc6ebdb6544d9d2
+SIZE (python/python-3.6.5-docs-html.tar.bz2) = 5970853
+SHA256 (python/python-3.6.5-docs-pdf-a4.tar.bz2) = aaffb3ad721395309e148e58be37fe2058dbd41d2f904d018d517f03f61453af
+SIZE (python/python-3.6.5-docs-pdf-a4.tar.bz2) = 13687656
+SHA256 (python/python-3.6.5-docs-pdf-letter.tar.bz2) = 487e6f146e072d0ec35ad1a5d1f3dc202d4842c3fab2d585431bb8fa0f8b297b
+SIZE (python/python-3.6.5-docs-pdf-letter.tar.bz2) = 13687120
+SHA256 (python/python-3.6.5-docs-text.tar.bz2) = 5c832942ef30cad209f91a00812890c8ac4d2681be4f05f01026242c6328316d
+SIZE (python/python-3.6.5-docs-text.tar.bz2) = 2136332
+SHA256 (python/python-3.7.0-docs-html.tar.bz2) = de2be9d07f6940aadac18e92ac76ce53556df9e5b28d5f1ba040def5cb3d5837
+SIZE (python/python-3.7.0-docs-html.tar.bz2) = 6222504
+SHA256 (python/python-3.7.0-docs-pdf-a4.tar.bz2) = 9976a53836129985219e6493e57a222e31d2d6e785eaf1172fb1a1f201186b97
+SIZE (python/python-3.7.0-docs-pdf-a4.tar.bz2) = 14044365
+SHA256 (python/python-3.7.0-docs-pdf-letter.tar.bz2) = 48910ebb4f0b0c3bb8b04d15ca3b796e624fb802c5f5280a440fd52a78d3afca
+SIZE (python/python-3.7.0-docs-pdf-letter.tar.bz2) = 14044393
+SHA256 (python/python-3.7.0-docs-text.tar.bz2) = 411a6a56c4fcda1e6bc6496ac696bf071697acd1a307ad3d0c9c01d8e003397a
+SIZE (python/python-3.7.0-docs-text.tar.bz2) = 2252692