Added option '-zc' puts const data in code-segment.

Added CURL_DISABLE_TFTP; tftp.c doesn't compile as-is.

lib/Makefile.Watcom

@@ -8,10 +8,11 @@ TARGETS = libcurl_wc.lib libcurl_wc.dll libcurl_wc_imp.lib
 
 CC = wcc386
 
-CFLAGS = -3r -mf -d3 -hc -zff -zgf -zq -zm -s -fr=con -w2 -fpi -oilrtfm -bt=nt -bd &
+CFLAGS = -3r -mf -d3 -hc -zff -zgf -zq -zm -zc -s -fr=con -w2 -fpi -oilrtfm -bt=nt -bd &
          -d+ -dWIN32 -dHAVE_LONGLONG -dCURL_CA_BUNDLE=getenv("CURL_CA_BUNDLE") &
          -dBUILDING_LIBCURL -dWITHOUT_MM_LIB -dHAVE_SPNEGO=1 -dENABLE_IPV6     &
-         -dDEBUG_THREADING_GETADDRINFO -dDEBUG=1 -dCURLDEBUG -I. -I..\include
+         -dDEBUG_THREADING_GETADDRINFO -dDEBUG=1 -dCURLDEBUG -dCURL_DISABLE_TFTP &
+         -I. -I..\include
 
 OBJ_DIR  = Watcom_obj
 LIB_ARG  = $(OBJ_DIR)\wlib.arg