Requiring pcre 8.11 is no longer enough.  gregex.c refers symbol
PCRE_INFO_MAXLOOKBEHIND which is introduced in pcre 8.31.
Let application restart work on MacOS X < 10.6

MacOS X < 10.6 had an undocumented behavior concerning execve(2)
inside a threaded process. If a process tried to call execve(2) and
had more than one active thread, the kernel returned ENOTSUP. So we
have to either fork(2) or vfork(2) before calling execve(2) to make
sure the caller is single-threaded as otherwise the application fails
to restart itself.
Update to 2.3.2:
This release fixes a build issue with FreeType 2.5.1 & later, and
fixes the prototypes in the man page for XftDrawString8 & XftDrawRect.
Updated x11/libXft to 2.3.2