[PATCH v2] Add -iglx & +iglx to Xserver.man

[Alan Coopersmith]

Covers the current state after commits 99f0365b1fbdfd9238b9f,
d0da0e9c3bb8fe0cd4879, & e3aa13b8d63ea2fba6eb4 were all applied.

Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>
---

v2: Made claims about what Indirect GLX supports more vague yet more
    accurate than before, at the suggestion of Robert & James.
    Also dropped note about compatibility with third-party GLX modules,
    since they should add support as part of their 1.17 ABI updates.

 man/Xserver.man |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/man/Xserver.man b/man/Xserver.man
index c03830c..3bf844f 100644
--- a/man/Xserver.man
+++ b/man/Xserver.man
@@ -181,6 +181,16 @@ prints a usage message.
 .B \-I
 causes all remaining command line arguments to be ignored.
 .TP 8
+.B \-iglx
+Prohibit creating indirect GLX contexts.  Indirect GLX is of limited use,
+since it lacks support for many modern OpenGL features and extensions;
+it's slower than direct contexts; and it opens a large attack surface for
+protocol parsing errors.
+This is the default unless +iglx is specified.
+.TP 8
+.B +iglx
+Allow creating indirect GLX contexts.
+.TP 8
 .B \-maxbigreqsize \fIsize\fP
 sets the maximum big request to
 .I size
-- 
1.7.9.2