This patch adds missing newlines, trims multiple redundant final
newlines into a single one, and trims redundant leading newlines in all
*.phpt sections.

According to POSIX, a line is a sequence of zero or more non-' <newline>'
characters plus a terminating '<newline>' character. [1] Files should
normally have at least one final newline character.

C89 [2] and later standards [3] mention a final newline:
"A source file that is not empty shall end in a new-line character,
which shall not be immediately preceded by a backslash character."

Although it is not mandatory for all files to have a final newline
fixed, a more consistent and homogeneous approach brings less of commit
differences issues and a better development experience in certain text
editors and IDEs.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206
[2] https://port70.net/~nsz/c/c89/c89-draft.html#2.1.1.2
[3] https://port70.net/~nsz/c/c99/n1256.html#5.1.1.2

When Wincache or APC are installed, the resource IDs are not the same.
This is because Wincache takes a few resource objects for itself.  As a
result, these tests become false positives.

On Windows boxes, the microtime precision is not granular enough
to reliably register a difference if two calls to uniqid() are made
concurrently.  This is a fix to the uniqid() test to avoid the false
positive when run on Windows machines.  Also, added a test to exercise
the 'more_entropy' variant of uniqid().