intro.1, time.1, _syscall.2, accept.2, capget.2, clone.2, execve.2, fcntl.2, intro...

intro.1, time.1, _syscall.2, accept.2, capget.2, clone.2, execve.2, fcntl.2, intro.2, ioctl_list.2, ioprio_set.2, kill.2, mlock.2, nanosleep.2, perf_event_open.2, select.2, stat.2, times.2, ustat.2, vfork.2, wait.2, cfree.3, dbopen.3, dlopen.3, fenv.3, fmtmsg.3, gamma.3, getaddrinfo.3, gethostbyname.3, getnameinfo.3, getspnam.3, login.3, printf.3, regex.3, stdio.3, sysconf.3, termios.3, ttyslot.3, undocumented.3, wordexp.3, console_codes.4, initrd.4, mouse.4, random.4, st.4, tty_ioctl.4, wavelan.4, charmap.5, dir_colors.5, hosts.5, termcap.5, armscii-8.7, boot.7, bootparam.7, capabilities.7, charsets.7, ddp.7, futex.7, glob.7, ipv6.7, iso_8859-1.7, iso_8859-10.7, iso_8859-11.7, iso_8859-13.7, iso_8859-14.7, iso_8859-15.7, iso_8859-16.7, iso_8859-2.7, iso_8859-3.7, iso_8859-4.7, iso_8859-5.7, iso_8859-6.7, iso_8859-7.7, iso_8859-8.7, iso_8859-9.7, koi8-r.7, koi8-u.7, man.7, numa.7, path_resolution.7, pipe.7, posixoptions.7, pthreads.7, pty.7, rtnetlink.7, signal.7, time.7, udp.7, udplite.7, unicode.7, uri.7, utf-8.7: G;lobal fix: remove unneeded double quotes in .SS headings

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>