Remove fixed search paths from autotools.

--- a/m4/package_utilies.m4	1970-01-01 01:00:01.000000000 +0100
+++ b/m4/package_utilies.m4	2020-07-07 12:41:48.871661042 +0200
@@ -23,32 +23,32 @@
     AC_PACKAGE_NEED_UTILITY($1, "$cc", cc, [C compiler])
 
     if test -z "$MAKE"; then
-        AC_PATH_PROG(MAKE, gmake,, /usr/bin:/usr/freeware/bin)
+        AC_PATH_PROG(MAKE, gmake)
     fi
     if test -z "$MAKE"; then
-        AC_PATH_PROG(MAKE, make,, /usr/bin)
+        AC_PATH_PROG(MAKE, make)
     fi
     make=$MAKE
     AC_SUBST(make)
     AC_PACKAGE_NEED_UTILITY($1, "$make", make, [GNU make])
 
     if test -z "$LIBTOOL"; then
-	AC_PATH_PROG(LIBTOOL, glibtool,, /usr/bin)
+	AC_PATH_PROG(LIBTOOL, glibtool)
     fi
     if test -z "$LIBTOOL"; then
-	AC_PATH_PROG(LIBTOOL, libtool,, /usr/bin:/usr/local/bin:/usr/freeware/bin)
+	AC_PATH_PROG(LIBTOOL, libtool)
     fi
     libtool=$LIBTOOL
     AC_SUBST(libtool)
     AC_PACKAGE_NEED_UTILITY($1, "$libtool", libtool, [GNU libtool])
 
     if test -z "$TAR"; then
-        AC_PATH_PROG(TAR, tar,, /usr/freeware/bin:/bin:/usr/local/bin:/usr/bin)
+        AC_PATH_PROG(TAR, tar)
     fi
     tar=$TAR
     AC_SUBST(tar)
     if test -z "$ZIP"; then
-        AC_PATH_PROG(ZIP, gzip,, /bin:/usr/local/bin:/usr/freeware/bin)
+        AC_PATH_PROG(ZIP, gzip)
     fi
 
     zip=$ZIP
@@ -61,25 +61,25 @@
     AC_SUBST(makedepend)
 
     if test -z "$AWK"; then
-        AC_PATH_PROG(AWK, awk,, /bin:/usr/bin)
+        AC_PATH_PROG(AWK, awk)
     fi
     awk=$AWK
     AC_SUBST(awk)
 
     if test -z "$SED"; then
-        AC_PATH_PROG(SED, sed,, /bin:/usr/bin)
+        AC_PATH_PROG(SED, sed)
     fi
     sed=$SED
     AC_SUBST(sed)
 
     if test -z "$ECHO"; then
-        AC_PATH_PROG(ECHO, echo,, /bin:/usr/bin)
+        AC_PATH_PROG(ECHO, echo)
     fi
     echo=$ECHO
     AC_SUBST(echo)
 
     if test -z "$SORT"; then
-        AC_PATH_PROG(SORT, sort,, /bin:/usr/bin)
+        AC_PATH_PROG(SORT, sort)
     fi
     sort=$SORT
     AC_SUBST(sort)
ubmit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=ed4fb7dda73b5788a46707117468b7c615b68c92'>root</a>/<a href='/guix/log/gnu?id=ed4fb7dda73b5788a46707117468b7c615b68c92'>gnu</a>/<a href='/guix/log/gnu/system?id=ed4fb7dda73b5788a46707117468b7c615b68c92'>system</a>/<a href='/guix/log/gnu/system/linux-container.scm?id=ed4fb7dda73b5788a46707117468b7c615b68c92'>linux-container.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/system/linux-container.scm?id=ed4fb7dda73b5788a46707117468b7c615b68c92&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-08-09 20:32:13 +0200'>2022-08-09</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=26af06b66b65354a46b2196d1c11c90168b7fa12'>linux-container: container-script: Parse command line options.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/linux-container.scm (container-script): Accept command line
options to bind mount host directories into the container.
* doc/guix.texi (Invoking guix system): Document options.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2022-05-31 14:53:42 -0400'>2022-05-31</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=edac21bfc78ffea85f4dac7206e5e7cd621bba19'>gnu: Remove wicd.</a><span class='msg-avail'>...<span class='msg-tooltip'>The last release is from 2017, stuck on Python 2.

* gnu/packages/wicd.scm: Delete file.
* gnu/packages/patches/wicd-bitrate-none-fix.patch: Delete file.
* gnu/packages/patches/wicd-get-selected-profile-fix.patch: Likewise.
* gnu/packages/patches/wicd-urwid-1.3.patch: Likewise.
* gnu/packages/patches/wicd-wpa2-ttls.patch: Likewise.
* gnu/local.mk: De-register them.
* gnu/services/networking.scm: Remove wicd service...
* doc/guix.texi: ... and its documentation.
* gnu/system/linux-container.scm (containerized-operating-system)
&lt;services-to-drop&gt;: Remove wicd-service-type.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-03-19 18:26:00 +0100'>2022-03-19</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=cff9fee82a06f58b10a5b3a7743295c53f7988b8'>linux-container: Add #:guest-uid and #:guest-gid to 'eval/container'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/linux-container.scm (eval/container): Add #:guest-uid
and #:guest-gid and honor them.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-03-19 18:26:00 +0100'>2022-03-19</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=c77544b387882450599b5f7e2712abdadaa074e9'>linux-container: 'eval/container' honors #:namespaces.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/linux-container.scm (eval/container): Pass #:namespaces to
'call-with-container'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-01-13 22:24:18 +0100'>2021-01-13</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=0d22fc8d36e4efba9748c94cab7cedbbe2bbb5bf'>services: shepherd: 'shepherd-service-type' requires documentation.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/shepherd.scm (shepherd-service-type): Require a
'description' form.
* gnu/services/base.scm (root-file-system-service-type)
(rngd-service-type, host-name-service-type):
(virtual-terminal-service-type, console-keymap-service-type)
(syslog-service-type, swap-service-type)
(kmscon-service-type): Add description.
* gnu/services/networking.scm (dhcp-client-service-type): Likewise.
* gnu/system/install.scm (cow-store-service-type): Likewise.
* gnu/system/linux-container.scm (dummy-networking-service-type):
Likewise.
* gnu/system/mapped-devices.scm (device-mapping-service-type):
Likewise.
* tests/guix-system.sh: Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>