[bug-mailutils] complies with "--disable-smtp"

[Robert Young]

libtool: link: mipsel-openwrt-linux-musl-gcc -Os -pipe
-mno-branch-likely -mips32r2 -mtune=24kec -mdsp -fno-caller-saves
-fno-plt -fho
nour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result
-msoft-float -mips16 -minterlink-mips16 -iremap /tmp/x6/build_d
ir/target-mipsel_24kec+dsp_musl-1.1.15/mailutils-2.99.993:mailutils-2.99.993
-Wformat -Werror=format-security -fstack-protector -D_FOR
TIFY_SOURCE=1 -Wl,-z -Wl,now -Wl,-z -Wl,relro -Wall
-Wdeclaration-after-statement -ggdb -znow -zrelro -o .libs/mailutils
dispatch.o ge
tans.o getarg.o getyn.o mu.o shell.o util.o verbose.o acl.o cflags.o
filter.o flt2047.o help.o info.o ldflags.o logger.o query.o send.
o wicket.o  -L/tmp/x6/staging_dir/target-mipsel_24kec+dsp_musl-1.1.15/usr/lib
-L/tmp/x6/staging_dir/target-mipsel_24kec+dsp_musl-1.1.1
5/lib 
-L/tmp/x6/staging_dir/toolchain-mipsel_24kec+dsp_gcc-5.3.0_musl-1.1.15/usr/lib
-L/tmp/x6/staging_dir/toolchain-mipsel_24kec+dsp_
gcc-5.3.0_musl-1.1.15/lib ../lib/.libs/libmuaux.so
../libproto/mbox/.libs/libmu_mbox.so
../libproto/mailer/.libs/libmu_mailer.so /tmp/
x6/build_dir/target-mipsel_24kec+dsp_musl-1.1.15/mailutils-2.99.993/libmu_auth/.libs/libmu_auth.so
../libmu_auth/.libs/libmu_auth.so /
tmp/x6/build_dir/target-mipsel_24kec+dsp_musl-1.1.15/mailutils-2.99.993/libmailutils/.libs/libmailutils.so
../libmailutils/.libs/libma
ilutils.so -lcrypt -lresolv -lpthread
/tmp/x6/staging_dir/toolchain-mipsel_24kec+dsp_gcc-5.3.0_musl-1.1.15/bin/../lib/gcc/mipsel-openwrt-linux-musl/5.3.0/../../../../mipsel
-openwrt-linux-musl/bin/ld: copy reloc against protected
`__stack_chk_guard' is dangerous
dispatch.o:(.data+0x7c): undefined reference to `mutool_smtp'
dispatch.o:(.data+0x80): undefined reference to `smtp_docstring'
collect2: error: ld returned 1 exit status
Makefile:1123: recipe for target 'mailutils' failed
make[7]: *** [mailutils] Error 1
make[7]: Leaving directory
'/tmp/x6/build_dir/target-mipsel_24kec+dsp_musl-1.1.15/mailutils-2.99.993/mu'
Makefile:1022: recipe for target 'all' failed

disable-smtp.patch.txt
Description: Text document