Make 1991/dds C generated code use fgets()

This took less time than the previous fix (to let it work with clang)
because after stupidly doing the decryption/encryption manually I had
decided to write a simple program that does it instead.

Now systems won't whine about gets() being unsafe.

The thanks file further documents how this was done and the bugs.md file
no longer has this entry.

1991/dds/dds.c

@@ -7,12 +7,13 @@ o)*|gps)<<*txjudi)m*|aQdbtf!::::;sfuvso<aQefgbvmu;aQ<m,,a%CQ<csfbla%bQ<aN2!Q\
 Qs\\q,,^>m,2<m>aP4HC%SD12N1\nJNQm>s\\..q^aHC%NHb%GN1!D32P3%RN1UP1D12JPQUaP1H\
 R%PN4\nQ<g\\(aP3Q(^>aP2Q,2<n\\(aP3Q(^>aP4Hb%OD12D12N2!N3\nJVP3Q,,<jg)aP3Q=>n\
 \\(aP3Q(^*m>g\\(aP3Q(^<fmtf!m,,aHC%QN1!N1\nJ#Qqsjoug)#&e]o#-aP1Q*aHb%#Qqvut)\
-aP1Q*aHb%FN1\nQm>::::aHC%VP3Q>bupj)hfut)c**aHb%JD12JON1!Qjg)a%LN1UP1D12JIQUa\
-P1HL%IQ*m>aN2!N2\nP2Q<fmtf!m,,aHC%MN1!N2>P2Q>aN2\nP2Hbdd!.Xop.fssps!.Xop.sfu\
-vso.uzqf!.Xop.jnqmjdju.gvodujpo.efdmbsbujpo!b/d";int k;char R[4][99]
-;main(c,v)char**v;{char*p,*r,*q;for(q=s;*q;q++)*q>' '&&(*q)--;{FILE*i=fopen(v
-[1],"r"),*o=fopen(q-3,"w");if(!i||!o)return 1;for(p=s;;p++)switch(*p++){B'M':
-Q(k=fgetc(i))!=EOF&&k!=*p)*r++=k;if(k==EOF){fputs("}}\n",o);fclose(o);return
-system(q-69);}*r=0 B'P':while(*p!='`')fputc(*p++,o)B'O':Q*r)fputc(*r++,o);p--
-B'C':k=0;Q k<*p-'0')(*r++=fgetc(i),k++);*r=0 B'I':k= *p;if(**R==k)goto G B'G'
-:k= *p;G:p=s;while(*p!='$'||p[1]!= k)p++;p++B'N':R[*p-'0'][0]++;}}}
+aP1Q*aHb%FN1\nQm>::::aHC%VP3Q>bupj)ghfut)c-::-tuejo**aHb%JD12JON1!Qjg)a%LN1U\
+P1D12JIQUaP1HL%IQ*m>aN2!N2\nP2Q<fmtf!m,,aHC%MN1!N2>P2Q>aN2\nP2Hbdd!.Xop.fssp\
+s!.Xop.sfuvso.uzqf!.Xop.jnqmjdju.gvodujpo.efdmbsbujpo!.jodmvef!tuejp/i!b/d";
+int k;char R[4][99];main(c,v)char**v;{char*p,*r,*q;for(q=s;*q;q++)*q>' '&&(*
+q)--;{FILE*i=fopen(v[1],"r"),*o=fopen(q-3,"w");if(!i||!o)return 1;for(p=s;;p
+++)switch(*p++){B'M':Q(k=fgetc(i))!=EOF&&k!=*p)*r++=k;if(k==EOF){fputs("}}\n"
+,o);fclose(o);return system(q-86);}*r=0 B'P':while(*p!='`')fputc(*p++,o)B'O':
+Q*r)fputc(*r++,o);p--B'C':k=0;Q k<*p-'0')(*r++=fgetc(i),k++);*r=0 B'I':k= *p;
+if(**R==k)goto G B'G':k= *p;G:p=s;while(*p!='$'||p[1]!= k)p++;p++B'N':R[*p-'0'
+][0]++;}}}