patch 8.0.0633: the client-server test is still a bit flaky

Problem:    The client-server test is still a bit flaky.
Solution:   Wait a bit for the GUI to start.  Check that the version number
            can be obtained.

patch 8.0.0632: the quotestar test is still a bit flaky

Problem:    The quotestar test is still a bit flaky.
Solution:   Kill any existing server to make the retry work.  Wait for the
            register to be filled.

patch 8.0.0631: can't build with Perl 5.26

Problem:    Perl 5.26 also needs S_TOPMARK and S_POPMARK defined.
Solution:   Define the functions when needed. (Jesin, closes vim#1748)

patch 8.0.0630: it is not easy to work on lines without a match

Problem:    The :global command does not work recursively, which makes it
            difficult to execute a command on a line where one pattern matches
            and another does not match. (Miles Cranmer)
Solution:   Allow for recursion if it is for only one line. (closes vim#1760)

patch 8.0.0629: checking for ambigous width is not working

Problem:    Checking for ambigous width is not working. (Hirohito Higashi)
Solution:   Reset "starting" earlier.

patch 8.0.0628: cursor disappears after silent mapping

Problem:    Cursor disappears after silent mapping. (Ramel Eshed)
Solution:   Do restore the cursor when it was changed, but don't change it in
            the first place for a silent mapping.

patch 8.0.0627: "gn" selects only one character with 'nowrapscan'

Problem:    When 'wrapscan' is off "gn" does not select the whole pattern when
            it's the last one in the text. (KeyboardFire)
Solution:   Check if the search fails. (Christian Brabandt, closes vim#1683)

patch 8.0.0626: in the GUI the cursor may flicker

Problem:    In the GUI the cursor may flicker.
Solution:   Check the cmd_silent flag before updating the cursor shape.
            (Hirohito Higashi, closes vim#1637)

patch 8.0.0625: shellescape() always escapes a newline

Problem:    shellescape() always escapes a newline, which does not work with
            some shells. (Harm te Hennepe)
Solution:   Only escape a newline when the "special" argument is non-zero.
            (Christian Brabandt, closes vim#1590)

patch 8.0.0624: warning for unused variable in tiny build

Problem:    Warning for unused variable in tiny build. (Tony Mechelynck)
Solution:   Add an #ifdef.