Fix documentation and some comments (article, grammar)

Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

qemu-doc.texi

@@ -1037,7 +1037,7 @@ qemu-system-i386 -iscsi initiator-name=iqn.qemu.test:my-initiator \
 @node disk_images_gluster
 @subsection GlusterFS disk images
 
-GlusterFS is an user space distributed file system.
+GlusterFS is a user space distributed file system.
 
 You can boot from the GlusterFS disk image with the command:
 @example

qemu-options.hx

@@ -2589,7 +2589,7 @@ qemu-system-i386 --drive file=sheepdog://192.0.2.1:30000/MyVirtualMachine
 See also @url{http://http://www.osrg.net/sheepdog/}.
 
 @item GlusterFS
-GlusterFS is an user space distributed file system.
+GlusterFS is a user space distributed file system.
 QEMU supports the use of GlusterFS volumes for hosting VM disk images using
 TCP, Unix Domain Sockets and RDMA transport protocols.
 

util/uri.c

@@ -342,7 +342,7 @@ rfc3986_parse_port(URI *uri, const char **str)
  * @uri:  pointer to an URI structure
  * @str:  the string to analyze
  *
- * Parse an user informations part and fills in the appropriate fields
+ * Parse a user information part and fill in the appropriate fields
  * of the @uri structure
  *
  * userinfo      = *( unreserved / pct-encoded / sub-delims / ":" )
@@ -508,7 +508,7 @@ rfc3986_parse_authority(URI *uri, const char **str)
 
     cur = *str;
     /*
-     * try to parse an userinfo and check for the trailing @
+     * try to parse a userinfo and check for the trailing @
      */
     ret = rfc3986_parse_user_info(uri, &cur);
     if ((ret != 0) || (*cur != '@'))