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sslutil: synchronize hostname matching logic with CPython...

sslutil: synchronize hostname matching logic with CPython sslutil contains its own hostname matching logic. CPython has code for the same intent. However, it is only available to Python 2.7.9+ (or distributions that have backported 2.7.9's ssl module improvements). This patch effectively imports CPython's hostname matching code from its ssl.py into sslutil.py. The hostname matching code itself is pretty similar. However, the DNS name matching code is much more robust and spec conformant. As the test changes show, this changes some behavior around wildcard handling and IDNA matching. The new behavior allows wildcards in the middle of words (e.g. 'f*.com' matches 'foo.com') This is spec compliant according to RFC 6125 Section 6.5.3 item 3. There is one test where the matcher is more strict. Before, '*.a.com' matched '.a.com'. Now it doesn't match. Strictly speaking this is a security vulnerability.

Matt Mackall - - Load All Authors

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        Matt Mackall
    
bdiff: balance recursion to avoid quadratic behavior (issue4704)...

              r29014
            
      #require no-pure

      A script to generate nasty diff worst-case scenarios:

        $ cat > s.py <<EOF

        > import random

        > for x in xrange(100000):

        >     print

        >     if random.randint(0, 100) >= 50:

        >         x += 1

        >     print hex(x)

        > EOF

        $ hg init a

        $ cd a

      Check in a big file:

        $ python ../s.py > a

        $ hg ci -qAm0

      Modify it:

        $ python ../s.py > a

      Time a check-in, should never take more than 10 seconds user time:

        $ hg ci --time -m1

        time: real .* secs .user [0-9][.].* sys .* (re)

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Matt Mackall bdiff: balance recursion to avoid quadratic behavior (issue4704)...	r29014	#require no-pure

		A script to generate nasty diff worst-case scenarios:

		$ cat > s.py <<EOF
		> import random
		> for x in xrange(100000):
		> print
		> if random.randint(0, 100) >= 50:
		> x += 1
		> print hex(x)
		> EOF

		$ hg init a
		$ cd a

		Check in a big file:

		$ python ../s.py > a
		$ hg ci -qAm0

		Modify it:

		$ python ../s.py > a

		Time a check-in, should never take more than 10 seconds user time:

		$ hg ci --time -m1
		time: real .* secs .user [0-9][.].* sys .* (re)