[oe] [PATCH][meta-networking] postfix.inc: do not hardcode userid and groupid

[Hongxu Jia]

It hardcoded to assign vmail's userid and groupid with 5000,
which caused the following useradd/groupadd is increased from
5000 at do_root time. Such as 'tracing' group id is 5001
(tracing group is added in lttng-tools).

It is better to allocate it dynamically.

BTW, you may google to find the hardcoded 5000 in following site:
https://help.ubuntu.com/community/PostfixVirtualMailBoxClamSmtpHowto

In its main.cf, it also hardcoded virtual_uid_maps and virtual_gid_maps.
...
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
..

But in meta-oe's main.cf_2.0, it assigned virtual_uid_maps and
virtual_gid_maps with a search.
...
virtual_uid_maps = static:`grep vmail /etc/passwd | cut -d ":" -f 3`
virtual_gid_maps = static:`grep vmail /etc/passwd | cut -d ":" -f 4`
...

So please feel free to forget 5000.

Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
---
 meta-networking/recipes-daemons/postfix/postfix.inc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta-networking/recipes-daemons/postfix/postfix.inc b/meta-networking/recipes-daemons/postfix/postfix.inc
index 3e7f918..6d39570 100644
--- a/meta-networking/recipes-daemons/postfix/postfix.inc
+++ b/meta-networking/recipes-daemons/postfix/postfix.inc
@@ -36,9 +36,9 @@ INITSCRIPT_PARAMS = "start 58 3 4 5 . stop 13 0 1 6 ."
 USERADD_PACKAGES = "${PN}"
 USERADD_PARAM_${PN} = \
 "-d /var/spool/postfix -r -g postfix --shell /bin/false postfix; \
- -d /var/spool/vmail -r -u 5000 -g vmail --shell /bin/false vmail \
+ -d /var/spool/vmail -r -g vmail --shell /bin/false vmail \
 "
-GROUPADD_PARAM_${PN} = "--system postfix;--system postdrop;-g 5000 --system vmail"
+GROUPADD_PARAM_${PN} = "--system postfix;--system postdrop;--system vmail"
 
 export SYSLIBS = "${LDFLAGS}"
 
-- 
1.9.1