retire man pages that are way outdated and add html target for english man page

Makefile

@@ -6,7 +6,6 @@ BINDIR=${PREFIX}/bin
 SUBDIR= lib
 
 PROG=spectrwm
-#MAN=spectrwm_pt.1 spectrwm_ru.1 spectrwm_es.1 spectrwm_it.1
 MAN=spectrwm.1
 
 CFLAGS+=-std=c99 -Wmissing-prototypes -Wall -Wextra -Wshadow -Wno-uninitialized -g
@@ -21,23 +20,13 @@ CPPFLAGS+= -DSPECTRWM_BUILDSTR=\"$(BUILDVERSION)\"
 
 MANDIR= ${PREFIX}/man/man
 
-#spectrwm_ru.cat1: spectrwm_ru.1
-#	 nroff -mandoc ${.CURDIR}/spectrwm_ru.1 > ${.TARGET}
-
 obj: _xenocara_obj
 
 beforeinstall:
 	ln -sf ${PROG} ${BINDIR}/scrotwm
 
-# clang targets
-.if ${.TARGETS:M*analyze*}
-CC=clang
-CXX=clang++
-CPP=clang -E
-CFLAGS+=--analyze
-.endif
+spectrwm.html: spectrwm.1
+	mandoc -Thtml ${.CURDIR}/spectrwm.1 > spectrwm.html
 
-analyze: all
-clang: all
 .include <bsd.prog.mk>
 .include <bsd.xorg.mk>