env does not wrap variables that contain semicolon in quotes

[Minghui Liu]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-redhat-linux-gnu' 
-DCONF_VENDOR='redhat' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -O2 -g -pipe -Wall 
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong 
--param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic
uname output: Linux pp772 4.9.41-moby #1 SMP Wed Sep 6 00:05:16 UTC 2017 x86_64 
x86_64 x86_64 GNU/Linux
Machine Type: x86_64-redhat-linux-gnu

Bash Version: 4.2
Patch Level: 46
Release Status: release

Description:
        If an environment variable has semicolon in it (for example, 
LS_COLORS), env output does not quote it. This cause problem when saving env 
output in a file and then source it later.

Repeat-By:
        1. Make sure you have an environment variable, such as LS_COLORS that 
has semicolon in it.
        2. Save env output in a file
                env > env_save
        3. Source the file just saved
                . env_save
        You should see bash complain because it got confused by the semicolons 
in the variable.

Fix:
        Wrap environment variables that contain semicolons (or other characters 
that may confuse bash) using quotes in env output.