guestfs_version: Correct documentation.

Remove reference to 'ELF weak linking tricks' and replace
with suggestion to use dl* functions.
(cherry picked from commit 94030c5ce8b5848330e15e812a01064d5afcc6d0)

diff --git a/src/generator.ml b/src/generator.ml
index fbb992a..6fee544 100755 (executable)
--- a/src/generator.ml
+++ b/src/generator.ml
@@ -791,8 +791,9 @@ against a completely different C<libguestfs.so> library.
 
 This call was added in version C<1.0.58>.  In previous
 versions of libguestfs there was no way to get the version
-number.  From C code you can use ELF weak linking tricks to find out if
-this symbol exists (if it doesn't, then it's an earlier version).
+number.  From C code you can use dynamic linker functions
+to find out if this symbol exists (if it doesn't, then
+it's an earlier version).
 
 The call returns a structure with four elements.  The first
 three (C<major>, C<minor> and C<release>) are numbers and